diff --git a/Makefile b/Makefile
index ee5e4b0..308a8af 100644
--- a/Makefile
+++ b/Makefile
@@ -7,7 +7,7 @@ all: bin/mamaker
 test: bin/mamaker
 	bin/mamaker
 
-bin/mamaker: obj/main.o obj/base.o obj/assembly.o obj/display.o
+bin/mamaker: obj/main.o obj/base.o obj/edit.o obj/assembly.o obj/display.o
 	mkdir -p bin
 	$(CC) $(FLAGS) $^ $(LFLAGS) -o $@
 
@@ -18,6 +18,7 @@ obj/%.o: src/%.c
 obj/main.o: src/main.c
 obj/base.o: src/base.c
 obj/assembly.o: src/assembly.c
+obj/edit.o: src/edit.c
 obj/display.o: src/display.c
 
 .PHONY: clean mrproper
diff --git a/bin/mamaker b/bin/mamaker
index df62722..8a1cfa9 100755
Binary files a/bin/mamaker and b/bin/mamaker differ
diff --git a/obj/assembly.o b/obj/assembly.o
new file mode 100644
index 0000000..5c51fcd
Binary files /dev/null and b/obj/assembly.o differ
diff --git a/obj/base.o b/obj/base.o
new file mode 100644
index 0000000..4ddd147
Binary files /dev/null and b/obj/base.o differ
diff --git a/obj/display.o b/obj/display.o
new file mode 100644
index 0000000..67a27e2
Binary files /dev/null and b/obj/display.o differ
diff --git a/obj/edit.o b/obj/edit.o
new file mode 100644
index 0000000..6b6ff79
Binary files /dev/null and b/obj/edit.o differ
diff --git a/obj/main.o b/obj/main.o
new file mode 100644
index 0000000..2dc0c17
Binary files /dev/null and b/obj/main.o differ
diff --git a/src/assembly.c b/src/assembly.c
index e263c21..c654afd 100644
--- a/src/assembly.c
+++ b/src/assembly.c
@@ -14,24 +14,44 @@
 #include "consts.h"
 #include "base.h"
 #include "display.h"
+#include "edit.h"
 #include "assembly.h"
 
+cell* start ;
+
+int* item_costs ;
+int* item_start ;
+int* item_end ;
+bool* item_is_normal_type ;
+bool* item_is_special_type ;
+
+int* cell_count ;
+cell** playerCells ;
+
+player* players ;
+
 void init_empty_board() {
     start = malloc(sizeof(cell));
     start->id = 0 ;
-    start->coord_x = 50 ;
-    start->coord_y = 50 ;
+    start->coord_x = 0 ;
+    start->coord_y = 0 ;
     start->star_allowed = false ;
     start->type = START ;
-    start->prev_1 = start;
+    start->prev_1 = NULL;
     start->prev_2 = NULL;
     start->prev_3 = NULL;
     start->prev_4 = NULL;
-    start->next_1 = start;
+    start->next_1 = NULL;
     start->next_2 = NULL;
     start->next_3 = NULL;
     start->next_4 = NULL;
     start->meta = "start";
+
+    cell_count = malloc(sizeof(int)*n_cell_type);
+    cell_count[0] = 1;
+    for(int i = 1; i < n_cell_type; i++) {
+        cell_count[i] = 0;
+    }
 }
 
 void init_players() {
@@ -132,7 +152,7 @@ void init_everything() {
     init_players();
     printf("Initializing items...\n");
     init_shop("src/config.txt");
-    printf("Initialization complete...\n");
+    printf("Initialization complete!\n\n");
     //print_items();
 }
 
@@ -145,6 +165,7 @@ void print_items() {
 }
 
 void destroy_everything() {
+    printf("Destroying everything...\n");
     for(int i = 0; i < n_players; i++) {
         free(players[i].items);
     };
@@ -155,6 +176,8 @@ void destroy_everything() {
     free(item_is_normal_type);
     free(item_is_special_type);
     free(cell_count);
+
+    printf("Destruction complete!...\n\n");
 }
 
 #include "consts.h"
diff --git a/src/base.c b/src/base.c
index ae5256c..ce4d57c 100644
--- a/src/base.c
+++ b/src/base.c
@@ -14,6 +14,8 @@
 #include "consts.h"
 #include "base.h"
 
+imgs digits ;
+
 int ln_baseN(int n, int b) {
     int r = 0;
     while(n != 0) {
@@ -33,19 +35,43 @@ int pw(int x, int n) {
     return x*pw(x*x, n/2);
 }
 
+int abs(int n) {
+    if(n > 0) {
+        return n;
+    } else {
+        return (-n);
+    }
+}
+
+double absf(double n) {
+    if(n > 0.0f) {
+        return n;
+    } else {
+        return (-n);
+    }
+}
+
+int convex_seg(int x1, int x2, double theta) {
+    return (int)(((1.0f - theta) * x1 + theta * x2));
+}
+
 bool is_an_integer(char c) {
     return ((int)c >= 48 && (int)c <= 57);
 }
 
-float to_float(int n) {
-    return (float)n ;
+double to_double(int n) {
+    return (double)n ;
 }
 
-float to_int(float n) {
+int to_int(double n) {
     return (int)n ;
 }
 
-imgs import_digits(SDL_Renderer* renderer) {
+double distance_pt(int x1, int x2, int y1, int y2) {
+    return sqrt(to_double(pw(x2 - x1, 2) + pw(y2 - y1, 2)));
+}
+
+void import_digits(SDL_Renderer* renderer) {
     imgs res;
     res.arr = malloc(sizeof(SDL_Texture*)*10);
     SDL_Texture* texture;
@@ -111,7 +137,7 @@ imgs import_digits(SDL_Renderer* renderer) {
     SDL_FreeSurface(img);
     res.arr[9] = texture;
 
-    return res;
+    digits = res;
 }
 
 void free_digits(imgs dgts) {
@@ -119,4 +145,12 @@ void free_digits(imgs dgts) {
         SDL_DestroyTexture(dgts.arr[i]);
     }
     free(dgts.arr);
+}
+
+bool is_star_allowed(int ctype) {
+    return ((CELLTYPE)ctype == BLUE) ;
+}
+
+bool is_hidden_block_allowed(int ctype) {
+    return ((CELLTYPE)ctype == BLUE || (CELLTYPE)ctype == RED) ;
 }
\ No newline at end of file
diff --git a/src/base.h b/src/base.h
index 2e1f29c..715d0ad 100644
--- a/src/base.h
+++ b/src/base.h
@@ -5,14 +5,26 @@ int ln_baseN(int n, int b);
 
 int pw(int x, int n);
 
+int abs(int n);
+
+double absf(double n);
+
+int convex_seg(int x1, int x2, double theta);
+
 bool is_an_integer(char c);
 
-float to_float(int n);
+double to_double(int n);
 
-int to_int(float n);
+int to_int(double n);
 
-imgs import_digits(SDL_Renderer* renderer);
+double distance_pt(int x1, int x2, int y1, int y2);
+
+void import_digits(SDL_Renderer* renderer);
 
 void free_digits(imgs dgts);
 
+bool is_star_allowed(int ctype);
+
+bool is_hidden_block_allowed(int ctype);
+
 #endif
\ No newline at end of file
diff --git a/src/consts.h b/src/consts.h
index 5c14b37..4711d52 100644
--- a/src/consts.h
+++ b/src/consts.h
@@ -75,27 +75,29 @@ typedef struct player {
 
 typedef struct imgs {int len; SDL_Texture** arr;} imgs ;
 
-static int* cell_count ;
+// arrays
+extern int* cell_count ;
 
-static int* item_costs ;
-static int* item_start ;
-static int* item_end ;
-static bool* item_is_normal_type ;
-static bool* item_is_special_type ;
+extern int* item_costs ;
+extern int* item_start ;
+extern int* item_end ;
+extern bool* item_is_normal_type ;
+extern bool* item_is_special_type ;
 
+// global
 static int n_turns = 20;
 
 static int n_star_spaces = 5 ;
 static int star_cost = 20 ;
 
-static cell* start ; // starting tile
+extern cell* start ; // starting tile
 
-static cell** playerCells ;
+extern cell** playerCells ;
 static int n_players ;
 
-static player* players ;
+extern player* players ;
 
-static imgs* digits ;
+extern imgs digits ;
 // len is always 10 for this
 
 static int __width__ = 1200 ;
diff --git a/src/display.c b/src/display.c
index 41f6e23..86ab3ae 100644
--- a/src/display.c
+++ b/src/display.c
@@ -40,6 +40,25 @@ void placeRectToRenderer(SDL_Renderer* renderer, int X, int Y, int W, int H, int
     SDL_RenderFillRect(renderer, &rect);
 }
 
+void drawLineWithThicc(SDL_Renderer* renderer, int width, int x1, int x2, int y1, int y2, int R, int G, int B, int A) {
+    double theta = 0.0;
+    double seglen = distance_pt(x1, x2, y1, y2);
+    while(theta < 1.0) {
+        placeRectToRenderer(renderer, convex_seg(x1, x2, theta)-width/2, convex_seg(y1, y2, theta)-width/2, width, width, R, G, B, A);
+        theta += 1 / seglen;
+    }
+}
+
+void drawLineWithThiccGradient(SDL_Renderer* renderer, int start_width, int end_width, int x1, int x2, int y1, int y2, int R, int G, int B, int A) {
+    double theta = 0.0;
+    double seglen = distance_pt(x1, x2, y1, y2);
+    while(theta < 1.0) {
+        int width = convex_seg(start_width, end_width, theta) ;
+        placeRectToRenderer(renderer, convex_seg(x1, x2, theta)-width/2, convex_seg(y1, y2, theta)-width/2, width, width, R, G, B, A);
+        theta += 1 / seglen;
+    }
+}
+
 void drawDigitToRenderer(SDL_Renderer* renderer, imgs data, int digit, int X, int Y, int W, int H) {
     if (!(0 <= digit && digit <= 9))
     {
@@ -74,12 +93,25 @@ void drawNumberToRenderer(SDL_Renderer* renderer, imgs data, int n, int X, int Y
 
 void draw_cell(SDL_Renderer* renderer, int xmin, int xmax, int ymin, int ymax, cell* cl, int draw_id) {
     if(cl != NULL && cl->id != draw_id && cl->coord_x - tile_size > xmin && cl->coord_x - tile_size < xmax && cl->coord_y > ymin && cl->coord_y < ymax) {
-        int nxmin = to_int((to_float(cl->coord_x) - to_float(xmin)) * to_float(__width__)) / (to_float(xmax) - to_float(xmin)) ;
-        int nymin = to_int((to_float(cl->coord_y) - to_float(ymin)) * to_float(__height__)) / (to_float(ymax) - to_float(ymin)) ;
-        placeRectToRenderer(renderer, nxmin, nymin, tile_size, tile_size, 255, 255, 255, SDL_ALPHA_OPAQUE);
+        // draw lines
+        cl->id = draw_id;
+        int nxmin = to_int((to_double(cl->coord_x) - to_double(xmin)) * to_double(__width__)) / (to_double(xmax) - to_double(xmin)) ;
+        int nymin = to_int((to_double(cl->coord_y) - to_double(ymin)) * to_double(__height__)) / (to_double(ymax) - to_double(ymin)) ;
 
-        cl->id = draw_id ;
+        if(cl->next_1 != NULL) {
+            drawLineWithThiccGradient(renderer, tile_size, 3, nxmin, to_int((to_double(cl->next_1->coord_x) - to_double(xmin)) * to_double(__width__)) / (to_double(xmax) - to_double(xmin)), nymin, to_int((to_double(cl->next_1->coord_y) - to_double(ymin)) * to_double(__height__)) / (to_double(ymax) - to_double(ymin)), 255, 255, 0, SDL_ALPHA_OPAQUE);
+        };
+        if(cl->next_2 != NULL) {
+            drawLineWithThiccGradient(renderer, tile_size, 3, nxmin, to_int((to_double(cl->next_2->coord_x) - to_double(xmin)) * to_double(__width__)) / (to_double(xmax) - to_double(xmin)), nymin, to_int((to_double(cl->next_2->coord_y) - to_double(ymin)) * to_double(__height__)) / (to_double(ymax) - to_double(ymin)), 255, 255, 0, SDL_ALPHA_OPAQUE);
+        };
+        if(cl->next_3 != NULL) {
+            drawLineWithThiccGradient(renderer, tile_size, 3, nxmin, to_int((to_double(cl->next_3->coord_x) - to_double(xmin)) * to_double(__width__)) / (to_double(xmax) - to_double(xmin)), nymin, to_int((to_double(cl->next_3->coord_y) - to_double(ymin)) * to_double(__height__)) / (to_double(ymax) - to_double(ymin)), 255, 255, 0, SDL_ALPHA_OPAQUE);
+        };
+        if(cl->next_4 != NULL) {
+            drawLineWithThiccGradient(renderer, tile_size, 3, nxmin, to_int((to_double(cl->next_4->coord_x) - to_double(xmin)) * to_double(__width__)) / (to_double(xmax) - to_double(xmin)), nymin, to_int((to_double(cl->next_4->coord_y) - to_double(ymin)) * to_double(__height__)) / (to_double(ymax) - to_double(ymin)), 255, 255, 0, SDL_ALPHA_OPAQUE);
+        };
 
+        // recursive calls
         draw_cell(renderer, xmin, xmax, ymin, ymax, cl->prev_1, draw_id);
         draw_cell(renderer, xmin, xmax, ymin, ymax, cl->prev_2, draw_id);
         draw_cell(renderer, xmin, xmax, ymin, ymax, cl->prev_3, draw_id);
@@ -89,11 +121,23 @@ void draw_cell(SDL_Renderer* renderer, int xmin, int xmax, int ymin, int ymax, c
         draw_cell(renderer, xmin, xmax, ymin, ymax, cl->next_2, draw_id);
         draw_cell(renderer, xmin, xmax, ymin, ymax, cl->next_3, draw_id);
         draw_cell(renderer, xmin, xmax, ymin, ymax, cl->next_4, draw_id);
+        
+        // draw current cell
+        placeRectToRenderer(renderer, nxmin-tile_size/2, nymin-tile_size/2, tile_size, tile_size, 255, 255, 255, SDL_ALPHA_OPAQUE);
     } else if(cl != NULL) {
         cl->id = draw_id;
     }
 }
 
 void draw_board(SDL_Renderer* renderer, int xmin, int xmax, int ymin, int ymax, cell* one_cell) {
-    draw_cell(renderer, xmin, xmax, ymin, ymax, one_cell, one_cell->id +1);
+    if(one_cell == NULL) {
+        fprintf(stderr, "ERROR : cannot draw NULL cell\n");
+        exit(1);
+    } else {
+        resetRenderer(renderer);
+
+        draw_cell(renderer, xmin, xmax, ymin, ymax, one_cell, (one_cell->id +1)%727);
+
+        updateRenderer(renderer);
+    }
 }
\ No newline at end of file
diff --git a/src/display.h b/src/display.h
index a5a6dd8..898358f 100644
--- a/src/display.h
+++ b/src/display.h
@@ -9,6 +9,10 @@ void drawRectToRenderer(SDL_Renderer* renderer, SDL_Rect* rect, int R, int G, in
 
 void placeRectToRenderer(SDL_Renderer* renderer, int X, int Y, int W, int H, int R, int G, int B, int A);
 
+void drawLineWithThicc(SDL_Renderer* renderer, int width, int x1, int x2, int y1, int y2, int R, int G, int B, int A);
+
+void drawLineWithThiccGradient(SDL_Renderer* renderer, int start_width, int end_width, int x1, int x2, int y1, int y2, int R, int G, int B, int A);
+
 void drawDigitToRenderer(SDL_Renderer* renderer, imgs data, int digit, int X, int Y, int W, int H);
 
 void drawNumberToRenderer(SDL_Renderer* renderer, imgs data, int n, int X, int Y, int W, int H, int Woffset);
diff --git a/src/edit.c b/src/edit.c
new file mode 100644
index 0000000..7b89dd5
--- /dev/null
+++ b/src/edit.c
@@ -0,0 +1,111 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <math.h>
+#include <stdbool.h>
+#include <ncurses.h>
+#include <unistd.h>
+#include <termios.h>
+#include <limits.h>
+#include <time.h>
+#include <SDL2/SDL.h>
+#include <SDL2/SDL_image.h>
+
+#include "consts.h"
+#include "base.h"
+#include "edit.h"
+
+void link_cells(cell* parent, cell* child) {
+    if(parent != NULL) {
+        if(parent->next_1 == NULL) {
+            parent->next_1 = child;
+        } else if(parent->next_2 == NULL) {
+            parent->next_2 = child;
+        } else if(parent->next_3 == NULL) {
+            parent->next_3 = child;
+        } else if(parent->next_4 == NULL) {
+            parent->next_4 = child;
+        } else {
+            fprintf(stderr, "Unable to link cell : parent is at full capacity.\n");
+        }
+    };
+    if(child != NULL) {
+        if(child->prev_1 == NULL) {
+            child->prev_1 = parent;
+        } else if(child->prev_2 == NULL) {
+            child->prev_2 = parent;
+        } else if(child->prev_3 == NULL) {
+            child->prev_3 = parent;
+        } else if(child->prev_4 == NULL) {
+            child->prev_4 = parent;
+        } else {
+            fprintf(stderr, "Unable to link cell : child is at full capacity.\n");
+        }
+    }
+}
+
+void unlink_cells(cell* parent, cell* child) {
+    if(parent != NULL) {
+        if(parent->next_1 == child) {
+            parent->next_1 = NULL;
+        } else if(parent->next_2 == child) {
+            parent->next_2 = NULL;
+        } else if(parent->next_3 == child) {
+            parent->next_3 = NULL;
+        } else if(parent->next_4 == child) {
+            parent->next_4 = NULL;
+        } else {
+            fprintf(stderr, "Unable to unlink cell : no link found.\n");
+        }
+    };
+    if(child != NULL) {
+        if(child->prev_1 == parent) {
+            child->prev_1 = NULL;
+        } else if(child->prev_2 == parent) {
+            child->prev_2 = NULL;
+        } else if(child->prev_3 == parent) {
+            child->prev_3 = NULL;
+        } else if(child->prev_4 == parent) {
+            child->prev_4 = NULL;
+        } else {
+            fprintf(stderr, "Unable to unlink cell : no link found.\n");
+        }
+    };
+}
+
+void append_cell(int cell_type, int X, int Y, cell* parent) {
+    cell* new = malloc(sizeof(cell));
+    new->id = parent->id;        // mostly for parkour
+    new->coord_x = X;
+    new->coord_y = Y;
+    new->star_allowed = is_star_allowed(cell_type);
+    new->type = (CELLTYPE)cell_type ;
+    new->prev_1 = NULL ;
+    new->prev_2 = NULL;
+    new->prev_3 = NULL;
+    new->prev_4 = NULL;
+    new->next_1 = NULL;
+    new->next_2 = NULL;
+    new->next_3 = NULL;
+    new->next_4 = NULL;
+    char* meta = "none";
+
+    link_cells(parent, new);
+    cell_count[cell_type] += 1;
+}
+
+void destroy_cell(cell* cl) {
+    unlink_cells(cl, cl->next_1);
+    unlink_cells(cl, cl->next_2);
+    unlink_cells(cl, cl->next_3);
+    unlink_cells(cl, cl->next_4);
+
+    unlink_cells(cl->prev_1, cl);
+    unlink_cells(cl->prev_2, cl);
+    unlink_cells(cl->prev_3, cl);
+    unlink_cells(cl->prev_4, cl);
+
+    cell_count[(int)cl->type] -= 1;
+
+    free(cl);
+}
\ No newline at end of file
diff --git a/src/edit.h b/src/edit.h
new file mode 100644
index 0000000..078955f
--- /dev/null
+++ b/src/edit.h
@@ -0,0 +1,12 @@
+#ifndef GBM_EDIT_H
+#define GBM_EDIT_H
+
+void link_cells(cell* parent, cell* child);
+
+void unlink_cells(cell* parent, cell* child);
+
+void append_cell(int cell_type, int X, int Y, cell* parent);
+
+void destroy_cell(cell* cl);
+
+#endif
diff --git a/src/main.c b/src/main.c
index 0ceccfd..c76f527 100644
--- a/src/main.c
+++ b/src/main.c
@@ -14,6 +14,7 @@
 #include "consts.h"
 #include "display.h"
 #include "base.h"
+#include "edit.h"
 #include "assembly.h"
 
 int main(int argc, char** argv) {
@@ -42,6 +43,17 @@ int main(int argc, char** argv) {
     /* -------------------------------------------------------- */
 
     init_everything();
+
+    draw_board(rend, -250, 250, -250, 250, start);
+    sleep(1);
+
+    append_cell(1, 75, 75, start);
+    draw_board(rend, -250, 250, -250, 250, start);
+    sleep(1);
+
+    append_cell(1, 75, 0, start->next_1);
+    draw_board(rend, -250, 250, -250, 250, start);
+    sleep(1);
     
     destroy_everything();