function newJoystick(name)
    local screenW, screenH = display.contentWidth, display.contentHeight
    local classJoystick = {}
    classJoystick.idButton = name
    function classJoystick:Picture(x,y)
        self.controller = ...
        self.classJoystick.buttonUp = ...
        self.classJoystick.buttonDown = ...
        self.buttonLeft = ...
        self.buttonRight = ...
    end
    return classJoystick
end