save project

snake.py

@@ -52,10 +52,11 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
     if x==food_x and y==food_y:
-        food_x=random.randint(0,660)
-        food_y=random.randint(0,480)        
+        food_x=random.randint(0,21)*30
+        food_y=random.randint(0,15)*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
@@ -65,7 +66,7 @@ while True:
         screen.blit(body, position[i])
 
     # 将果实画上去
-    screen.blit(food, (360, 300))
+    screen.blit(food, (food_x, food_y))
     # 刷新画面
     pygame.display.update()
     FPSCLOCK.tick(3)
\ No newline at end of file