### Copyright (C) The Holy Ghost 2017
###This program is released under the GPL 3.0 and artistic license 2.0.

use Box;

unit module Sprite;

class Sprite is export {
        has $.box;

        method BUILD($x, $y, $w, $h) {
                .box = Box($x,$y,$w,$h);
        }

        method draw() {
        }

        method update() {
        }

}

second file :
### Copyright (C) The Holy Ghost 2017
###This program is released under the GPL 3.0 and artistic license 2.0.

use Sprite;

unit module Enemy;

class Enemy is Sprite {

        submethod BUILD() {

        }

}