f3cdc58f ​

input = fill 10v (fill 10h black) |> fold (fold rect) #0
output = fill 10v (fill 10h black) |> rect ((#1, 3h, 10v, 3h), green) |> rect ((#2, 2h, 10v, 2h), red) |> rect ((#3, 4h, 10v, 4h), yellow) |> rect ((#4, 1h, 10v, 1h), blue)
(OList UList ((VInt, HInt, VInt, HInt), Color), VInt, VInt, VInt, VInt)
([{((10v, 2h, 10v, 4h), blue), ((3v, 8h, 3v, 10h), blue)}, {((10v, 3h, 10v, 3h), red), ((8v, 1h, 8v, 1h), blue), ((5v, 10h, 5v, 10h), blue), ((5v, 1h, 5v, 1h), blue), ((3v, 1h, 3v, 1h), red), ((8v, 9h, 8v, 9h), green), ((8v, 6h, 8v, 6h), yellow), ((8v, 4h, 8v, 4h), yellow), ((7v, 3h, 7v, 3h), yellow), ((6v, 9h, 6v, 9h), red), ((6v, 5h, 6v, 5h), red), ((5v, 2h, 5v, 2h), yellow), ((4v, 7h, 4v, 7h), blue), ((3v, 6h, 3v, 6h), green), ((2v, 9h, 3v, 9h), yellow)}], 9v, 7v, 5v, 3v)
([{((10v, 8h, 10v, 10h), blue), ((1v, 8h, 3v, 10h), black)}, {((10v, 9h, 10v, 9h), black), ((10v, 6h, 10v, 6h), yellow), ((10v, 3h, 10v, 3h), yellow), ((4v, 1h, 4v, 1h), green), ((3v, 10h, 3v, 10h), yellow), ((1v, 8h, 1v, 9h), green), ((1v, 7h, 1v, 7h), black), ((1v, 6h, 1v, 6h), yellow), ((9v, 9h, 9v, 9h), green), ((9v, 4h, 9v, 4h), blue), ((8v, 7h, 8v, 7h), green), ((8v, 6h, 8v, 6h), yellow), ((8v, 2h, 8v, 2h), green), ((7v, 8h, 8v, 8h), red), ((7v, 3h, 7v, 3h), red), ((6v, 3h, 6v, 3h), blue), ((4v, 9h, 4v, 9h), red), ((4v, 5h, 4v, 5h), red), ((3v, 8h, 3v, 8h), blue), ((3v, 5h, 3v, 5h), blue), ((2v, 7h, 2v, 7h), green), ((2v, 3h, 2v, 3h), green), ((2v, 2h, 2v, 2h), blue)}], 3v, 6v, 6v, 4v)
([{((1v, 6h, 1v, 6h), yellow), ((9v, 3h, 9v, 3h), yellow), ((8v, 9h, 8v, 9h), yellow), ((8v, 5h, 8v, 5h), blue), ((7v, 2h, 7v, 2h), red), ((6v, 9h, 6v, 9h), red), ((6v, 6h, 6v, 6h), green), ((6v, 4h, 6v, 4h), yellow), ((4v, 8h, 4v, 8h), yellow), ((4v, 5h, 4v, 5h), red), ((4v, 2h, 4v, 2h), blue), ((3v, 9h, 3v, 9h), green), ((3v, 3h, 3v, 3h), green)}], 8v, 8v, 6v, 9v)
([{((10v, 8h, 10v, 10h), red), ((1v, 2h, 3v, 2h), green)}, {((10v, 9h, 10v, 9h), yellow), ((10v, 7h, 10v, 7h), black), ((10v, 6h, 10v, 6h), yellow), ((10v, 5h, 10v, 5h), red), ((9v, 10h, 9v, 10h), green), ((9v, 1h, 9v, 1h), blue), ((6v, 1h, 6v, 1h), green), ((4v, 1h, 4v, 1h), yellow), ((3v, 10h, 3v, 10h), green), ((1v, 1h, 3v, 1h), black), ((9v, 7h, 9v, 7h), blue), ((7v, 8h, 7v, 8h), green), ((6v, 5h, 6v, 5h), green), ((6v, 3h, 6v, 3h), blue), ((5v, 8h, 5v, 8h), red), ((4v, 8h, 4v, 8h), blue), ((4v, 4h, 5v, 4h), blue), ((3v, 4h, 3v, 4h), red), ((2v, 7h, 2v, 7h), yellow), ((2v, 6h, 2v, 6h), red), ((2v, 3h, 2v, 3h), green), ((2v, 2h, 2v, 2h), red)}], ?, ?, ?, ?)