class Settings():
    def __init__(self):
        self.screen_width =1200
        self.screen_height = 800
        self.bg_color = (230,230,230)

        self.ship_speed_factor =2

        #子弹设置
        self.bullet_speed_factor =1
        self.bullet_width =3
        self.bullet_height =15
        self.bullet_color =60,60,60,

        self.bullets_allowed = 5
