save project

snake.py

@@ -53,11 +53,16 @@ while True:
     else:
         y += 30
     position.append((x, y))
-
-    position.pop(0)
+    
     if ax==x and ay==y:
-        ax=random.randint(0,800)
-        ay=random.randint(0,600)
+        n1=random.randint(0,21)
+        n2=random.randint(0,15)
+        ax=n1*30
+        ay=n2*30
+    else:
+        position.pop(0)    
+        
+
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去