def startup(self, now, persistant):
        self.game_controller.screen.fill(Color.BLACK)

        def callback(sc):
            sc.blit(self.image, (0,0))

        credit.credit_from_file('resource/text/intro.txt',self.font, Color.WHITE, 15, callback)
    def credits(self):
        """
        Créditos
        """
        self.logos = []
        self.logos.append( self.game_controller.asset_manager.get_scalled_image('pygame.png', 0.5).convert_alpha() )
        self.logos.append( self.game_controller.asset_manager.get_scalled_image('pycharm.png', 0.5).convert_alpha() )
        self.logos.append( self.game_controller.asset_manager.get_scalled_image('gimp.png', 0.75).convert_alpha() )
        self.logos.append( self.game_controller.asset_manager.get_scalled_image('inkscape.png', 0.5).convert_alpha() )
        self.logos.append( self.game_controller.asset_manager.get_scalled_image('audacity.png', 0.5).convert_alpha() )

        self.y = 0
        def callback_credits(sc):

            for i, logo in enumerate(self.logos):
                x = self.game_controller.width - logo.get_width()
                sc.blit(logo, (x,self.y + i * 100) )
            self.y += 1

            if self.y > self.game_controller.height:
                self.y = -self.game_controller.height

        # self.screen.fill(Color.GRAY)
        self.screen.fill(Color.BLACK)

        credit.credit_from_file('resource/text/credits.txt', self.fontsmall, Color.WHITE, 20, callback_credits)