save project

snake.py

@@ -53,14 +53,14 @@ while True:
         y -= 30
     else:
         y += 30
-    if x==jx and y==jy:
-        jx=random.randint(0,22)
-        jy=random.randint(0,16)
+    if x==apple_x and y==apple_y:
+        jx=random.randint(1,22)
+        jy=random.randint(1,16)
         apple_x=jx*30-30
         apple_y=jy*30-30
-
+    else:
+        position.pop(0)
     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
@@ -73,4 +73,4 @@ while True:
     screen.blit(food, (apple_x, apple_y))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(3)
\ No newline at end of file
+    FPSCLOCK.tick(10)
\ No newline at end of file