diff --git a/bin/back b/bin/back
index 3d7bfca..c552269 100755
Binary files a/bin/back and b/bin/back differ
diff --git a/src/base.c b/src/base.c
index aba5b62..f71bf5f 100644
--- a/src/base.c
+++ b/src/base.c
@@ -209,6 +209,96 @@ void pop(array* arr, int elt) {
     }
 }
 
+bool str_equal(char* s1, char* s2) {
+    if(s1[0] == '\0' || s2[0] == '\0') {
+        return (s1[0] == '\0' && s2[0] == '\0');
+    } 
+    return (s1[0] == s2[0] && str_equal(&s1[1], &s2[1]));
+}
+
+// ------------------------------------------------------------------------------------------------ //
+
+void linked_add(linkedList* lst, int x, int y, char* flag) {
+    if(lst == NULL) { 
+        fprintf(stderr, "ERROR : linked list has not been initialized\n");
+        exit(1);
+    } else if(lst->next == NULL) {
+        lst->next = malloc(sizeof(linkedList));
+        lst->next->coord = x + 16*y ;
+        lst->next->flag = flag ;
+        lst->next->next = NULL ;
+    } else {
+        linked_add(lst->next, x, y, flag);
+    }
+}
+
+void linked_removeCoord(linkedList* lst, int x, int y) {
+    if(lst != NULL) {
+        if(lst->coord == x + 16*y) {
+            linkedList* temp = lst->next ;
+            free(lst) ;
+            lst = temp ;
+        } else {
+            linked_removeCoord(lst->next, x, y);
+        }
+    }
+}
+
+void linked_removeFlag(linkedList* lst, char* flag) {
+    if(lst != NULL) {
+        if(lst->flag == flag) {
+            linkedList* temp = lst->next ;
+            free(lst) ;
+            lst = temp ;
+        } else {
+            linked_removeFlag(lst->next, flag);
+        }
+    }
+}
+
+void linked_change(linkedList* lst, int x, int y, char* flag) {
+    linked_removeCoord(lst, x, y);
+    linked_add(lst, x, y, flag);
+}
+
+bool linked_mem(linkedList* lst, int x, int y, char** flag) {
+    if(lst == NULL) {
+        return false;
+    }
+    //printf("Searching for (%d, %d) [%d] ; have [%d]\n", x, y, x + 16*y, lst->coord);
+    if(lst->coord == x + 16*y) {
+        *flag = lst->flag;
+        return true ;
+    }
+    return linked_mem(lst->next, x, y, flag);
+}
+
+linkedList* linked_copy(linkedList* src) {
+    linkedList* new = malloc(sizeof(linkedList)) ;
+    new->flag = "E" ;
+    new->coord = 0 ;
+    new->next = NULL ;
+
+    //printf("in\n");
+    linkedList* curSrc = src->next ;
+    //printf("out\n");
+
+    while(curSrc != NULL) {
+        //printf("cp\n");
+        linked_add(new, curSrc->coord%8, curSrc->coord/16, curSrc->flag);
+        curSrc = curSrc->next;
+    }
+
+    return new ;
+}
+
+void linkedPrint(linkedList* lst) {
+    if(lst != NULL) {
+        printf("[(%d, %d), %s] ", lst->coord%8, lst->coord/16, lst->flag);
+        linkedPrint(lst->next);
+    }
+}
+
 // ------------------------------------------------------------------------------------------------ //
 
 void import_digits(SDL_Renderer* renderer) {
diff --git a/src/base.h b/src/base.h
index c693eb7..7235e8e 100644
--- a/src/base.h
+++ b/src/base.h
@@ -47,6 +47,22 @@ void append(array* arr, int elt);
 
 void pop(array* arr, int elt);
 
+bool str_equal(char* s1, char* s2);
+
+void linked_add(linkedList* lst, int x, int y, char* flag);
+
+void linked_removeCoord(linkedList* lst, int x, int y);
+
+void linked_removeFlag(linkedList* lst, char* flag);
+
+void linked_change(linkedList* lst, int x, int y, char* flag);
+
+bool linked_mem(linkedList* lst, int x, int y, char** flag);
+
+linkedList* linked_copy(linkedList* src);
+
+void linkedPrint(linkedList* lst);
+
 void import_digits(SDL_Renderer* renderer);
 
 void import_letters(SDL_Renderer* renderer);
diff --git a/src/display.c b/src/display.c
index 8b8fc32..19daf13 100644
--- a/src/display.c
+++ b/src/display.c
@@ -136,6 +136,22 @@ void drawStringToRenderer(SDL_Renderer* renderer, imgs data, char* s, int X, int
     }
 }
 
+void linked_draw(SDL_Renderer* renderer, linkedList* lst, int chx, int chy, int xmin, int xmax, int ymin, int ymax) {
+    if(lst != NULL) {
+        int cux = 50*(8*chx + lst->coord/16);
+        int cuy = 50*(8*chy + lst->coord%8);
+        int cux2 = 50*(8*chx + lst->coord/16+1);
+        int cuy2 = 50*(8*chy + lst->coord%8+1);
+        int nxmin = to_int((to_double(cux) - to_double(xmin)) * to_double(__width__)) / (to_double(xmax) - to_double(xmin)) ;
+        int nymin = to_int((to_double(cuy) - to_double(ymin)) * to_double(__height__)) / (to_double(ymax) - to_double(ymin)) ;
+        int nxmin2 = to_int((to_double(cux2) - to_double(xmin)) * to_double(__width__)) / (to_double(xmax) - to_double(xmin)) ;
+        int nymin2 = to_int((to_double(cuy2) - to_double(ymin)) * to_double(__height__)) / (to_double(ymax) - to_double(ymin)) ;
+        placeRectToRenderer(renderer, nxmin, nymin, nxmin2 - nxmin, nymin2 - nymin, 32+96*(str_equal(lst->flag, "spinCC")), 255, 32+96*(str_equal(lst->flag, "spinCW")), SDL_ALPHA_OPAQUE/2);
+
+        linked_draw(renderer, lst->next, chx, chy, xmin, xmax, ymin, ymax);
+    }
+}
+
 void drawChunkToRenderer(SDL_Renderer* renderer, chunk* ch, int xmin, int xmax, int ymin, int ymax) {
     if(ch->draw_id != draw_par) {
         ch->draw_id = draw_par ;
@@ -155,6 +171,7 @@ void drawChunkToRenderer(SDL_Renderer* renderer, chunk* ch, int xmin, int xmax,
                 cur = cur / 2 ;
             }
         }
+        linked_draw(renderer, ch->chdata.meta->next, ch->chx, ch->chy, xmin, xmax, ymin, ymax);
     }
 }
 // branchless goes brrr
diff --git a/src/display.h b/src/display.h
index 12da5c4..dad2607 100644
--- a/src/display.h
+++ b/src/display.h
@@ -21,6 +21,8 @@ void drawNumberToRenderer(SDL_Renderer* renderer, imgs data, int n, int X, int Y
 
 void drawStringToRenderer(SDL_Renderer* renderer, imgs data, char* s, int X, int Y, int W, int H);
 
+void linked_draw(SDL_Renderer* renderer, linkedList* lst, int chx, int chy, int xmin, int xmax, int ymin, int ymax);
+
 void drawChunkToRenderer(SDL_Renderer* renderer, chunk* ch, int xmin, int xmax, int ymin, int ymax);
 
 void drawHashToRenderer(SDL_Renderer* renderer, int chx, int chy, int xmin, int xmax, int ymin, int ymax, int distx, int disty);
diff --git a/src/generation.c b/src/generation.c
index 822313b..4330a4b 100644
--- a/src/generation.c
+++ b/src/generation.c
@@ -47,6 +47,8 @@ imgs letters ;
 template full ;
 template empty ;
 
+linkedList* endLst ;
+
 // yes Valentin I learned to use .h the intended way xD
 
 // ------------------------------------------------------------------------ //
@@ -61,6 +63,7 @@ template copy(template src) {
     new.eastsig = src.eastsig;
     new.westsig = src.westsig;
     new.checkCompat = src.checkCompat ;
+    new.meta = linked_copy(src.meta);
     new.lines = malloc(sizeof(uint8_t)*8);
     for(int i = 0; i < 8; i++) {
         new.lines[i] = src.lines[i];
@@ -108,7 +111,16 @@ void print_template(int config_id) {
     printf("\n");
 }
 
-void rotateTemplateClockWise(int config_id) {
+void rotateLinkedListCounterClockWise(linkedList* lst) {
+    if(lst != NULL) {
+        uint8_t newc = (lst->coord/16) + 16 * (7- (lst->coord%8));
+        //printf("(%d, %d) -> (%d, %d)\n", lst->coord%8, lst->coord/16, newc%8, newc/16);
+        lst->coord = newc ;
+        rotateLinkedListCounterClockWise(lst->next);
+    }
+}
+
+void rotateTemplateCounterClockWise(int config_id) {
     // 1st line become last column ... last line become 1st column
     uint8_t* new = malloc(sizeof(uint8_t)*8);
 
@@ -128,9 +140,37 @@ void rotateTemplateClockWise(int config_id) {
         }
     };
 
-    if(config_id >= 9 ) {
-        //print_template(config_id);
+    rotateLinkedListCounterClockWise(configs[config_id].meta);
+
+    free(new);
+}
+
+void rotateChunkCounterClockWise(int chx, int chy) {
+    chunk* ch = gridGet(map, chx, chy);
+    if(ch == NULL) {
+        fprintf(stderr, "ERROR : cannot rotate non-existing chunk\n");
+        exit(1);
     }
+    // 1st line become last column ... last line become 1st column
+    uint8_t* new = malloc(sizeof(uint8_t)*8);
+
+    ch->chdata.westsig = ch->chdata.lines[7];
+    ch->chdata.eastsig = ch->chdata.lines[0];
+
+    for(int i = 0; i < 8; i++) {
+        new[i] = ch->chdata.lines[i];
+        ch->chdata.lines[i] = 0;
+    };    
+    for(int i = 0; i < 8; i++) {
+        uint8_t rem = new[i];
+        for(int j = 0; j < 8; j++) {
+            ch->chdata.lines[j] *= 2 ;
+            ch->chdata.lines[j] += rem%2 ;
+            rem = rem / 2 ;
+        }
+    };
+
+    rotateLinkedListCounterClockWise(ch->chdata.meta);
 
     free(new);
 }
@@ -180,7 +220,7 @@ bool is_compat_with_spins(int cx, int cy, int idx) {
         if(is_compat_sig_north(cx, cy, idx) && is_compat_sig_east(cx, cy, idx) && is_compat_sig_south(cx, cy, idx) && is_compat_sig_west(cx, cy, idx)) {
             return true ;
         } else {
-            rotateTemplateClockWise(idx);
+            rotateTemplateCounterClockWise(idx);
         }
     };
     return false;
@@ -190,7 +230,7 @@ bool is_compat_with_spins_uno(int cx, int cy, int idx) {
     if(is_compat_sig_north(cx, cy, idx) && is_compat_sig_east(cx, cy, idx) && is_compat_sig_south(cx, cy, idx) && is_compat_sig_west(cx, cy, idx)) {
         return true ;
     } else {
-        rotateTemplateClockWise(idx);
+        rotateTemplateCounterClockWise(idx);
         return false;
     }
 }
@@ -209,7 +249,7 @@ void generate_chunk_all(int cx, int cy) {
             if(is_compat_with_spins_uno(cx, cy, idx)) {
                 i -= 1;
                 if(i != 0) {
-                    rotateTemplateClockWise(idx);
+                    rotateTemplateCounterClockWise(idx);
                     if(k == 3) {
                         idx = (idx+1)%n_configs;
                         k = 0 ;
@@ -268,6 +308,11 @@ void initialize(SDL_Renderer* renderer) {
     full.westsig = 255 ;
     full.eastsig = 255 ;
 
+    full.meta = malloc(sizeof(linkedList)) ;
+    full.meta->flag = "E" ;
+    full.meta->coord = 0 ;
+    full.meta->next = NULL ;
+
     full.checkCompat = false ;
 
     for(int i = 0; i < 8; i++) {
@@ -292,6 +337,16 @@ void initialize(SDL_Renderer* renderer) {
 
     empty.id = -1 ;
 
+    empty.meta = malloc(sizeof(linkedList)) ;
+    empty.meta->flag = "E" ;
+    empty.meta->coord = 0 ;
+    empty.meta->next = NULL ;
+
+    endLst = malloc(sizeof(linkedList));
+    endLst->flag = "E";
+    endLst->coord = 0 ;
+    endLst->next = NULL ;
+
     generate_chunk(0, 0, 2);
 }
 
@@ -310,15 +365,19 @@ void parse_one(FILE* ptr, FILE* ptr2, int index) {
         for(int j = 0; j < 8; j++) {
             int xres = get_integer_plus_align(ptr, ptr2);
             configs[index].lines[i] *= 2 ;
-            configs[index].lines[i] += xres ;
+            configs[index].lines[i] += (xres > 0) ;
+
+            if(xres == 2) {
+                printf("[%d] SP+1 : %d, %d\n", index, i, 7-j);
+                linked_add(configs[index].meta, i, 7-j, "spinCC");
+            } else if(xres == 3) {
+                printf("[%d] SP+1 : %d, %d\n", index, i, 7-j);
+                linked_add(configs[index].meta, i, 7-j, "spinCW");
+            }
 
             if(j == 7) {
-                //configs[index].westsig *= 2;
-                //configs[index].westsig += xres;
                 configs[index].westsig += pw(2, i) * xres ;
             } else if(j == 0) {
-                //configs[index].eastsig *= 2;
-                //configs[index].eastsig += xres;
                 configs[index].eastsig += pw(2, i) * xres ;
             }
         }
@@ -330,7 +389,9 @@ void parse_one(FILE* ptr, FILE* ptr2, int index) {
     printf("-----| Template %d (line %d) |-----\n", index, 9*index);
     print_template(index);
     printf("sigs : (%d, %d, %d, %d) (N, E, S, W)\n", configs[index].lines[0], configs[index].eastsig, configs[index].lines[7], configs[index].westsig);
-    printf("\n");
+    printf("SP : ");
+    linkedPrint(configs[index].meta);
+    printf("\n-----------------------------------\n");
 }
 
 void parse_configs(char* filename, int n_conf) {
@@ -345,6 +406,12 @@ void parse_configs(char* filename, int n_conf) {
         configs[i].eastsig = 0 ;
         configs[i].westsig = 0 ;
         configs[i].checkCompat = doCheck ;
+
+        configs[i].meta = malloc(sizeof(linkedList)) ;
+        configs[i].meta->flag = "E" ;
+        configs[i].meta->coord = 0 ;
+        configs[i].meta->next = NULL ;
+        
         configs[i].lines = malloc(sizeof(uint8_t)*8);
         for(int j = 0; j < 8; j++) {
             configs[i].lines[j] = 0;
diff --git a/src/generation.h b/src/generation.h
index 3e0bcb6..3b2a97d 100644
--- a/src/generation.h
+++ b/src/generation.h
@@ -9,7 +9,9 @@ void generate_chunk_raw(int x, int y, template tpl);
 
 void print_template(int config_id);
 
-void rotateTemplateClockWise(int config_id);
+void rotateTemplateCounterClockWise(int config_id);
+
+void rotateChunkCounterClockWise(int chx, int chy);
 
 void signature(template t);
 
diff --git a/src/hash.h b/src/hash.h
index 910202d..a65f79b 100644
--- a/src/hash.h
+++ b/src/hash.h
@@ -4,6 +4,14 @@
 #define GRID_H
 #include <stdbool.h>
 
+typedef enum special {ROT_CC, ROT_CW} special ;
+
+typedef struct linkedList {
+    uint8_t coord ;         // coord%8 = x ; coord/16 = y
+    char* flag ;
+    struct linkedList* next ;
+} linkedList ;
+
 typedef struct template {
     uint8_t id ;
     uint8_t* lines ;         // len = 8
@@ -12,6 +20,8 @@ typedef struct template {
 
     uint8_t eastsig ;
     uint8_t westsig ;
+
+    linkedList* meta ;
 } template ;
 
 typedef struct chunk {
diff --git a/src/move.c b/src/move.c
index b956f2e..bb87546 100644
--- a/src/move.c
+++ b/src/move.c
@@ -19,17 +19,61 @@
 #include "move.h"
 
 double speed = 0.5 ;
-int precision = 12 ;
+int precision = 8 ;
 
 double εx = 0.0;
 double εy = 0.0;
 
+bool useSpecialTiles(int chx, int chy, int x, int y) {
+    chunk* ch = gridGet(map, chx, chy);
+    if(ch == NULL) {
+        fprintf(stderr, "ERROR : action performed in unloaded chunk\n");
+        exit(1);
+    }
+    //linkedPrint(ch->chdata.meta->next);
+    //printf("\n");
+    char* flag ;
+    if(linked_mem(ch->chdata.meta->next, y, x, &flag)) {
+        //printf("Triggered\n");
+        if(str_equal(flag, "spinCC")) {
+            rotateChunkCounterClockWise(chx, chy);
+            double plx = (double)(player_x + εx) ;
+            double ply = (double)(player_y + εy) ;
+
+            double npx = 7.99999999 - ply ;
+            double npy = plx ;
+            //printf("(%lf, %lf) -> (%lf, %lf)\n", plx, ply, npx, npy);
+            player_x = (int)npx ;
+            εx = (double)(npx - (int)npx) ;
+
+            player_y = (int)npy ;
+            εy = (double)(npy - (int)npy) ;
+        } else if(str_equal(flag, "spinCW")) {
+            for(int k = 0; k < 3; k++) {
+                rotateChunkCounterClockWise(chx, chy);
+                double plx = (double)(player_x + εx) ;
+                double ply = (double)(player_y + εy) ;
+
+                double npx = 7.99999999 - ply ;
+                double npy = plx ;
+                //printf("(%lf, %lf) -> (%lf, %lf)\n", plx, ply, npx, npy);
+                player_x = (int)npx ;
+                εx = (double)(npx - (int)npx) ;
+
+                player_y = (int)npy ;
+                εy = (double)(npy - (int)npy) ;
+            }
+        }
+    }
+    return true ;
+}
+
 bool checkCollision() {
     return (unpack_coord(gridGet(map, player_cx, player_cy)->chdata.lines, player_x, player_y));
 }
 
 bool checkCollision2(int cx, int cy, int x, int y) {
-    return (unpack_coord(gridGet(map, cx, cy)->chdata.lines, x, y));
+    return (unpack_coord(gridGet(map, cx, cy)->chdata.lines, x, y) && useSpecialTiles(cx, cy, x, y));
 }
 
 void normalize(int* ch_coord, int* coord, double* ε) {
@@ -50,35 +94,6 @@ void normalize(int* ch_coord, int* coord, double* ε) {
     }
 }
 
-bool checkCollisionSquare(double square_size) {
-    double εxmin = εx - square_size;
-    double εxmax = εx + square_size;
-    double εymin = εy - square_size;
-    double εymax = εy + square_size;
-
-    int xmin = player_x ;
-    int xmax = player_x ;
-    int ymin = player_y ;
-    int ymax = player_y ;
-
-    int cxmin = player_cx ;
-    int cxmax = player_cx ;
-    int cymin = player_cy ;
-    int cymax = player_cy ;
-
-    normalize(&cxmin, &xmin, &εxmin);
-    normalize(&cxmax, &xmax, &εxmax);
-    normalize(&cymin, &ymin, &εymin);
-    normalize(&cymax, &ymax, &εymax);
-
-    return (
-        checkCollision2(cxmin, cymin, xmin, ymin) ||
-        checkCollision2(cxmin, cymax, xmin, ymax) ||
-        checkCollision2(cxmax, cymin, xmax, ymin) ||
-        checkCollision2(cxmax, cymax, xmax, ymax)
-    );
-}
-
 void increment_x(double dx) {
     εx = εx + dx ;
     if(εx >= 1.0) {
@@ -117,10 +132,39 @@ void increment_y(double dy) {
     }
 }
 
+bool checkCollisionSquare(double square_size) {
+    double εxmin = εx - square_size;
+    double εxmax = εx + square_size;
+    double εymin = εy - square_size;
+    double εymax = εy + square_size;
+
+    int xmin = player_x ;
+    int xmax = player_x ;
+    int ymin = player_y ;
+    int ymax = player_y ;
+
+    int cxmin = player_cx ;
+    int cxmax = player_cx ;
+    int cymin = player_cy ;
+    int cymax = player_cy ;
+
+    normalize(&cxmin, &xmin, &εxmin);
+    normalize(&cxmax, &xmax, &εxmax);
+    normalize(&cymin, &ymin, &εymin);
+    normalize(&cymax, &ymax, &εymax);
+
+    return (
+        checkCollision2(cxmin, cymin, xmin, ymin) ||
+        checkCollision2(cxmin, cymax, xmin, ymax) ||
+        checkCollision2(cxmax, cymin, xmax, ymin) ||
+        checkCollision2(cxmax, cymax, xmax, ymax)
+    );
+}
+
 bool moveRequest(double dx, double dy) {
     increment_x(dx);
     increment_y(dy);
-    if(checkCollisionSquare(0.15)) {
+    if(checkCollisionSquare(0.1)) {
         increment_x(-dx);
         increment_y(-dy);
         return false;
@@ -181,7 +225,9 @@ void moveFunctionMaster(SDL_Renderer* renderer) {
         drawNumberToRenderer(renderer, digits, player_cx, 10, 10, 50, 70, 0);
         drawNumberToRenderer(renderer, digits, player_cy, 10, 80, 50, 70, 0);
         drawNumberToRenderer(renderer, digits, player_x, __width__ / 3, 10, 50, 70, 0);
+        drawCharToRenderer(renderer, letters, 'x', __width__ / 3 -20, 10, 50, 70);
         drawNumberToRenderer(renderer, digits, player_y, __width__ / 3, 80, 50, 70, 0);
+        drawCharToRenderer(renderer, letters, 'y', __width__ / 3 -20, 80, 50, 70);
         drawNumberToRenderer(renderer, digits, to_int(εx*100), 2 * __width__ / 3, 10, 50, 70, 0);
         drawNumberToRenderer(renderer, digits, to_int(εy*100), 2 * __width__ / 3, 80, 50, 70, 0);
         updateRenderer(renderer);
diff --git a/src/move.h b/src/move.h
index 0887dcd..1422171 100644
--- a/src/move.h
+++ b/src/move.h
@@ -1,18 +1,20 @@
 #ifndef BACK_MOVE_H
 #define BACK_MOVE_H
 
+bool useSpecialTiles(int chx, int chy, int x, int y);
+
 bool checkCollision();
 
 bool checkCollision2(int cx, int cy, int x, int y);
 
 void normalize(int* ch_coord, int* coord, double* ε);
 
-bool checkCollisionSquare(double square_size);
-
 void increment_x(double dx);
 
 void increment_y(double dy);
 
+bool checkCollisionSquare(double square_size);
+
 bool moveRequest(double dx, double dy);
 
 void moveControl(bool* halt);
diff --git a/src/structure.h b/src/structure.h
index 05bfae3..481cef9 100644
--- a/src/structure.h
+++ b/src/structure.h
@@ -17,6 +17,8 @@ extern Grid map ;
 
 extern bool doCheck ;
 
+extern linkedList* endLst ;
+
 extern int emptyChance ;
 extern int sizeIncreaseChance ;
 
diff --git a/templates_lv1.txt b/templates_lv1.txt
index 58cb933..5d3834b 100644
--- a/templates_lv1.txt
+++ b/templates_lv1.txt
@@ -91,8 +91,8 @@
 1 1 0 0 0 0 1 1
 1 0 0 0 0 1 1 1
 0 0 0 0 1 1 1 0
-0 0 0 1 1 1 0 0
-0 0 1 1 1 0 0 0
+0 0 0 1 1 2 0 0
+0 0 3 1 1 0 0 0
 0 1 1 1 0 0 0 0
 1 1 1 0 0 0 0 1
 1 1 0 0 0 0 1 1
@@ -100,8 +100,8 @@
 1 1 1 1 1 1 1 1
 1 0 0 0 0 1 1 1
 0 0 0 0 1 1 1 0
-0 0 0 1 1 1 0 0
-0 0 1 1 1 0 0 0
+0 0 0 1 1 2 0 0
+0 0 3 1 1 0 0 0
 0 1 1 1 0 0 0 0
 1 1 1 0 0 0 0 1
 1 1 0 0 0 0 1 1
@@ -109,8 +109,8 @@
 1 1 0 0 0 0 1 1
 1 0 0 0 0 1 1 1
 0 0 0 0 1 1 1 1
-0 0 0 1 1 1 0 1
-0 0 1 1 1 0 0 1
+0 0 0 1 1 2 0 1
+0 0 3 1 1 0 0 1
 0 1 1 1 0 0 0 1
 1 1 1 0 0 0 0 1
 1 1 0 0 0 0 1 1