save project

snake.py

@@ -58,10 +58,14 @@ while True:
     else:
         y += 30
     position.append((x, y))
-    position.pop(0)
+    
     if x==apple_x and y==apple_y:
         apple_x=random.randint(1,22)
         apple_y=random.randint(1,16)
+        apple_x=apple_x*30-30
+        apple_y=apple_y*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
@@ -74,4 +78,4 @@ while True:
     screen.blit(food, (apple_x,apple_y))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(6)
\ No newline at end of file
+    FPSCLOCK.tick(10)
\ No newline at end of file