save project

snake.py

@@ -54,8 +54,11 @@ while True:
         y += 30
     position.append((x, y))
     if x==apple_x and 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=30*num1-30
+        apple_y=30*num2-30
+    else:   
         position.pop(0)
         # 将背景图画上去
         screen.blit(background, (0, 0))
@@ -69,4 +72,4 @@ while True:
     screen.blit(food, (apple_x,apple_y))
     # 刷新画面
     pygame.display.update()
-    FPSCLOCK.tick(5)
\ No newline at end of file
+    FPSCLOCK.tick(3)
\ No newline at end of file