66e6c45b ​

input = fill 4v (fill 4h black) |> rect ((3v, 3h, 3v, 3h), #0) |> rect ((3v, 2h, 3v, 2h), #1) |> rect ((2v, 3h, 2v, 3h), #2) |> rect ((2v, 2h, 2v, 2h), #3)
output = fill 4v (fill 4h black) |> rect ((4v, 4h, 4v, 4h), #0) |> rect ((4v, 1h, 4v, 1h), #1) |> rect ((1v, 4h, 1v, 4h), #2) |> rect ((1v, 1h, 1v, 1h), #3)
(Color, Color, Color, Color)
(fuschia, orange, yellow, green)
(green, teal, fuschia, grey)
(brown, yellow, green, red)