ba9d41b8 ​

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))
(16v, 15h, {((5v, 5h, 12v, 14h), red)}, [{((5v, 5h, 12v, 14h), red)}, {((9v, 7h, 11v, 7h), black)}, {((10v, 6h, 10v, 12h), black)}, {((8v, 7h, 10v, 11h), red)}, {((7v, 8h, 9v, 12h), red)}, {((6v, 12h, 8v, 12h), black)}, {((7v, 7h, 7v, 13h), black), ((9v, 9h, 9v, 11h), black), ((8v, 8h, 8v, 10h), black)}, {((11v, 13h, 11v, 13h), black), ((11v, 11h, 11v, 11h), black), ((11v, 9h, 11v, 9h), black), ((9v, 13h, 9v, 13h), black), ((8v, 6h, 8v, 6h), black), ((6v, 10h, 6v, 10h), black), ((6v, 8h, 6v, 8h), black), ((6v, 6h, 6v, 6h), black)}])
(13v, 15h, {((1v, 1h, 5v, 5h), blue), ((7v, 5h, 12v, 14h), teal)}, [{((7v, 5h, 12v, 14h), teal)}, {((10v, 6h, 10v, 12h), black), ((9v, 7h, 9v, 13h), black)}, {((1v, 1h, 5v, 5h), blue), ((10v, 7h, 10v, 11h), teal), ((9v, 8h, 9v, 12h), teal)}, {((4v, 4h, 4v, 4h), black), ((4v, 2h, 4v, 2h), black), ((3v, 3h, 3v, 3h), black), ((2v, 4h, 2v, 4h), black), ((2v, 2h, 2v, 2h), black), ((11v, 13h, 11v, 13h), black), ((11v, 11h, 11v, 11h), black), ((11v, 9h, 11v, 9h), black), ((11v, 7h, 11v, 7h), black), ((8v, 12h, 8v, 12h), black), ((8v, 10h, 8v, 10h), black), ((8v, 8h, 8v, 8h), black), ((8v, 6h, 8v, 6h), black)}])
(17v, 16h, {((10v, 11h, 14v, 16h), teal), ((10v, 1h, 16v, 8h), yellow), ((2v, 3h, 8v, 10h), green)}, [{((10v, 1h, 16v, 8h), yellow), ((2v, 3h, 8v, 10h), green)}, {((11v, 6h, 15v, 6h), black), ((11v, 4h, 15v, 4h), black), ((3v, 8h, 7v, 8h), black), ((3v, 6h, 7v, 6h), black)}, {((10v, 11h, 14v, 16h), teal), ((14v, 3h, 14v, 7h), black), ((6v, 5h, 6v, 9h), black)}, {((12v, 4h, 14v, 6h), yellow), ((11v, 14h, 13v, 14h), black), ((4v, 6h, 6v, 8h), green)}, {((12v, 13h, 12v, 15h), black), ((12v, 3h, 12v, 7h), black), ((13v, 3h, 13v, 5h), yellow), ((4v, 5h, 4v, 9h), black), ((5v, 5h, 5v, 7h), green)}, {((15v, 2h, 15v, 2h), black), ((13v, 12h, 13v, 12h), black), ((13v, 2h, 13v, 2h), black), ((11v, 12h, 11v, 12h), black), ((11v, 2h, 11v, 2h), black), ((12v, 14h, 12v, 14h), teal), ((7v, 4h, 7v, 4h), black), ((5v, 4h, 5v, 4h), black), ((3v, 4h, 3v, 4h), black)}])
(19v, 19h, {((12v, 2h, 19v, 12h), fuschia), ((12v, 14h, 17v, 18h), yellow), ((3v, 11h, 9v, 18h), orange), ((2v, 2h, 10v, 9h), teal)}, ?)