f83cb3f6 ​

input = fill #0 (fill #1 black) |> fold rect #2
output = fill #0 (fill #1 black) |> fold (fold rect) #3
(VInt, HInt, UList ((VInt, HInt, VInt, HInt), Color), OList UList ((VInt, HInt, VInt, HInt), Color))
(17v, 10h, {((15v, 1h, 15v, 1h), grey), ((9v, 1h, 9v, 10h), teal), ((8v, 10h, 8v, 10h), grey), ((7v, 1h, 7v, 1h), grey), ((5v, 10h, 5v, 10h), grey), ((1v, 3h, 1v, 3h), grey), ((16v, 2h, 16v, 2h), grey), ((15v, 8h, 15v, 8h), grey), ((14v, 7h, 14v, 7h), grey), ((13v, 4h, 13v, 4h), grey), ((11v, 3h, 11v, 3h), grey), ((6v, 6h, 6v, 6h), grey), ((3v, 7h, 3v, 7h), grey), ((3v, 2h, 3v, 2h), grey)}, [{((10v, 1h, 10v, 4h), grey), ((9v, 1h, 9v, 10h), teal), ((8v, 10h, 8v, 10h), grey), ((8v, 1h, 8v, 3h), grey), ((10v, 7h, 10v, 8h), grey), ((8v, 6h, 8v, 7h), grey)}])
(12v, 14h, {((12v, 13h, 12v, 13h), blue), ((12v, 11h, 12v, 11h), blue), ((11v, 1h, 11v, 1h), blue), ((2v, 1h, 2v, 1h), blue), ((1v, 14h, 1v, 14h), blue), ((1v, 6h, 9v, 6h), teal), ((9v, 9h, 9v, 9h), blue), ((9v, 3h, 9v, 3h), blue), ((8v, 11h, 8v, 11h), blue), ((7v, 8h, 7v, 8h), blue), ((6v, 9h, 6v, 9h), blue), ((3v, 8h, 3v, 8h), blue)}, [{((1v, 7h, 1v, 7h), blue), ((1v, 6h, 9v, 6h), teal), ((9v, 5h, 9v, 5h), blue), ((6v, 7h, 9v, 7h), blue), ((3v, 7h, 3v, 7h), blue), ((2v, 5h, 2v, 5h), blue)}])
(15v, 10h, {((13v, 10h, 13v, 10h), red), ((11v, 1h, 11v, 1h), red), ((10v, 10h, 10v, 10h), red), ((8v, 1h, 8v, 3h), teal), ((6v, 1h, 6v, 1h), red), ((4v, 10h, 4v, 10h), red), ((4v, 1h, 4v, 1h), red), ((2v, 1h, 2v, 1h), red), ((1v, 6h, 1v, 6h), red), ((1v, 3h, 1v, 3h), red), ((13v, 4h, 13v, 4h), red), ((12v, 9h, 12v, 9h), red), ((12v, 7h, 12v, 7h), red), ((8v, 6h, 8v, 9h), teal), ((6v, 5h, 6v, 5h), red), ((5v, 3h, 5v, 3h), red), ((2v, 5h, 2v, 5h), red)}, [{((7v, 1h, 9v, 1h), red)}, {((8v, 1h, 8v, 3h), teal), ((9v, 9h, 9v, 9h), red), ((9v, 7h, 9v, 7h), red), ((8v, 6h, 8v, 9h), teal), ((7v, 6h, 7v, 6h), red), ((7v, 3h, 7v, 3h), red)}])
(10v, 15h, {((10v, 15h, 10v, 15h), green), ((10v, 10h, 10v, 10h), green), ((10v, 8h, 10v, 8h), teal), ((9v, 1h, 9v, 1h), green), ((5v, 1h, 5v, 1h), green), ((4v, 15h, 4v, 15h), green), ((1v, 13h, 1v, 13h), green), ((1v, 8h, 3v, 8h), teal), ((9v, 12h, 9v, 12h), green), ((9v, 6h, 9v, 6h), green), ((8v, 4h, 8v, 4h), green), ((6v, 13h, 6v, 13h), green), ((6v, 8h, 8v, 8h), teal), ((6v, 6h, 6v, 6h), green), ((5v, 5h, 5v, 5h), green), ((4v, 13h, 4v, 13h), green), ((3v, 11h, 3v, 11h), green)}, ?)