diff --git a/a3/world.c b/a3/world.c
index e69de29..56c6d64 100644
--- a/a3/world.c
+++ b/a3/world.c
@@ -0,0 +1,34 @@
+#include "world.h"
+#include <stdlib.h>
+
+struct state* create_world(int width, int height) {
+    struct state* st = malloc(sizeof(struct state));
+      if (st == NULL) {
+         return NULL;
+    }
+      st->width = width;
+        st->height = height;
+         st->sx = 1; 
+          st->sy = 0;
+        st->snake = add_snake(NULL, width / 2, height / 2);
+
+    for (int i = 0; i < FOOD_COUNT; i++) {
+        st->foodx[i] = rand() % width;
+        st->foody[i] = rand() % height;
+      }
+     return st;
+}
+
+void free_world(struct state* st) {
+     if (st != NULL) {
+           free_snake(st->snake);
+          free(st);
+     }
+}
+
+void change_direction(struct state* st, int dx, int dy) {
+      if (st->sx != -dx || st->sy != -dy) {
+          st->sx = dx;
+         st->sy = dy;
+     }
+}