save project

snake.py

@@ -54,9 +54,10 @@ while True:
         y += 30
         y += 30
     position.append((x, y))
     position.append((x, y))
     if  x ==z and y == a:
     if  x ==z and y == a:
-        z=random.randint(0,22)*30
-        a=random.randint(0,24)*30
-    position.pop(0)
+        z=random.randint(0,21)*30
+        a=random.randint(0,15)*30
+    else:
+        position.pop(0)
     # 将背景图画上去
     # 将背景图画上去
     screen.blit(background, (0, 0))
     screen.blit(background, (0, 0))