(def ofs 0)
(def x1 0)
(def x2 0)
(def y1 0)
(def y2 0)
(def fb (mmap "/framebuffer"))
(def f (open "/framebuffer"))
(def color 0xffffff)
(def line (fn x y w (do
                        (def x1 (* 4 x))
                        (def x2 (* 4 (+ x w)))
                        (def ofs (* y 7680))
                        (while (lt x1 x2) (do (def x1 (+ x1 4)) (put32 fb (+ ofs x1) color)))
                        )))
(def box (fn x y sz (do
                     (def y1 y)
                     (def y2 (+ y sz))
                     (while (lt y1 y2) (do (def y1 (+ y1 1)) (line x y1 sz)))
                     (gc)
                     )))
(def box-size 2)
(def main (fn (do
(def box-size 2)
(def color 0)
(box 0 0 100)
(box 100 100 100)
(box 200 0 100)
(box 300 100 100)
(box 0 200 100)
(box 200 200 100)
(while (lt box-size 50)
  (do
      (def color 0xffffff)
      (def box-size (+ box-size 1))
      (box 0 0 box-size)
      (box 100 100 box-size)
      (def color 0xff00ff)
      (box 200 0 box-size)
      (def color 0x00ff00)
      (box 300 100 box-size)
      (def color 0x00ffff)
      (box 0 200 box-size)
      (def color 0xffff00)
      (box 200 200 box-size)
      (send f 0)))
)))