import pygame
from pygame import locals
pygame.init()
screen = pygame.display.set_mode((640,480))
bg_img=pygame.image.load('background.png')
play_img=pygame.image.load('play.png')
stop_img=pygame.image.load('stop.png')
last_img=pygame.image.load('last.png')
next_img=pygame.image.load('next.png')
logo_img=pygame.image.load('logo.png')
pygame.mixer.music.load('歌曲3.wav')
pygame.mixer.music.play()
f=0.1
pygame.mixer.music.set_volume(f)
while True:
    for event in pygame.event.get():
        if event.type==locals.QUIT:
            exit()
        if event.type==locals.KEYDOWN:
            if event.key==locals.K_UP:
                f += 0.1
                pygame.mixer.music.set_volume(f)
            if event.key==locals.K_DOWN:
                f -= 0.1
                pygame.mixer.music.set_volume(f) 
    
    screen.blit(bg_img,(0,0))
    screen.blit(play_img,(270,330))
    screen.blit(logo_img,(170,60))
    screen.blit(last_img,(120,350))
    screen.blit(next_img,(420,350))

    pygame.display.update()