diff --git a/bin/back b/bin/back
index 48616c9..4606abe 100755
Binary files a/bin/back and b/bin/back differ
diff --git a/obj/main.o b/obj/main.o
index a4d5c43..32c930f 100644
Binary files a/obj/main.o and b/obj/main.o differ
diff --git a/obj/menus.o b/obj/menus.o
index dfd5e99..194aa90 100644
Binary files a/obj/menus.o and b/obj/menus.o differ
diff --git a/src/main.c b/src/main.c
index 4456c34..56aef08 100644
--- a/src/main.c
+++ b/src/main.c
@@ -178,6 +178,7 @@ int main_alt() {
     init_hashtbl();
     init_ent_generator(10);
     init_proj();
+    init_interf();
     parse_rooms(6);
 
     // ---------------------------------------------------------------------------------------------------------------------------------------------- //
@@ -360,6 +361,7 @@ int main_alt() {
 
     hashtbl_free(visited);
     free_proj();
+    free_interf();
     free_pool();
 
     // optional: de-allocate all resources once they've outlived their purpose:
diff --git a/src/menus.c b/src/menus.c
index 097a398..33ae8b5 100644
--- a/src/menus.c
+++ b/src/menus.c
@@ -131,4 +131,17 @@ void gl_drawInteger(unsigned int fragShader, int n, float x, float y, float size
 
 void gl_initDrawRect(unsigned int shaderProgram) {
     glUseProgram(shaderProgram);
+}
+
+static onoff_button* buttonList;
+static interface* interfaceList;
+
+void init_interf() {
+    buttonList = malloc(sizeof(onoff_button)*256);
+    interfaceList = malloc(sizeof(interface)*64);
+}
+
+void free_interf() {
+    free(buttonList);
+    free(interfaceList);
 }
\ No newline at end of file
diff --git a/src/menus.h b/src/menus.h
index 9fedcb4..7b465ea 100644
--- a/src/menus.h
+++ b/src/menus.h
@@ -1,6 +1,33 @@
 #ifndef MENUS_H
 #define MENUS_H
 
+typedef enum button_action {WARP, SET_VAR} button_action ;
+
+typedef struct onoff_button {
+    int id;
+
+    char* text;
+    double x; double y; double w; double h;
+    int red;
+    int green;
+    int blue;
+
+    // {WARP, SET_VAR}
+    button_action type;
+    
+    // the value to change (if SET_VAR) or the destination interface (if WARP)
+    int* metadata;
+} onoff_button;
+
+typedef struct interface {
+    int intfid;
+
+    char* title;
+
+    onoff_button* buttons;
+    int nbuttons;
+} interface;
+
 void initMenus();
 
 void gl_drawRect(unsigned int fragShader, float x, float y, float w, float h, int r, int g, int b);
@@ -8,4 +35,7 @@ void gl_initDrawRect(unsigned int shaderProgram);
 
 void gl_drawInteger(unsigned int fragShader, int n, float x, float y, float size, int r, int g, int b, float width, int side);
 
+void init_interf();
+void free_interf();
+
 #endif
\ No newline at end of file