save project

snake.py

@@ -55,11 +55,15 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
+   
 
     if x==apple_x and y==apple_y:
-        apple_x=random.randit (0,660)
-        apple_y=random.randit(0,480)
+        num1=random.randit(1,22)
+        num2=random.randit(1,16)
+        apple_x=num1*30-30
+        apple_y=num2*30-30
+    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