save project

snake.py

@@ -53,8 +53,15 @@ while True:
         y -= 30
     else:
         y += 30
+    if x<0 or y<0 or y>450 or x>630:
+        exit()
+    if (x, y) in position:
+        exit()
+
+
     position.append((x, y))
 
+
     if x==apple_x and y==apple_y:
 
         apple_x=random.randint(0,21)*30
@@ -78,3 +85,10 @@ while True:
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
+
+
+
+
+
+
+