save project

snake.py

@@ -53,7 +53,6 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
     # 将背景图画上去
     screen.blit(background, (0, 0))
     # 将贪吃蛇的头画上去
@@ -65,8 +64,12 @@ while True:
     # 将果实画上去
     screen.blit(food, (apple_x, apple_y))
     if x == apple_x and y == apple_y:
-        apple_x=random.randint(0,660)
-        apple_y=random.randint(0,480)
+        num1 = random.randint(1,22)
+        num2 = random.randint(1,16)
+        apple_x = num1*30-30
+        apple_y = num2*30-30
+    else:
+        position.pop(0)
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
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