df8cc377 ​

input = fill #0 (fill #1 black) |> fold rect #2 |> fold rect #3
output = fill #0 (fill #1 black) |> fold (fold rect) #4
(VInt, HInt, UList ((VInt, HInt, VInt, HInt), Color), UList ((VInt, HInt, VInt, HInt), Color), OList UList ((VInt, HInt, VInt, HInt), Color))
(18v, 23h, {((7v, 15h, 14v, 21h), yellow), ((2v, 2h, 5v, 8h), teal)}, {((18v, 15h, 18v, 15h), fuschia), ((1v, 11h, 1v, 11h), fuschia), ((17v, 20h, 17v, 20h), fuschia), ((17v, 11h, 17v, 11h), fuschia), ((17v, 2h, 17v, 2h), green), ((16v, 5h, 16v, 5h), fuschia), ((14v, 11h, 14v, 11h), fuschia), ((14v, 6h, 14v, 6h), green), ((13v, 2h, 13v, 2h), fuschia), ((12v, 11h, 12v, 11h), green), ((11v, 6h, 11v, 6h), fuschia), ((10v, 2h, 10v, 2h), fuschia), ((9v, 8h, 9v, 8h), green), ((8v, 4h, 8v, 4h), fuschia), ((7v, 10h, 7v, 10h), fuschia), ((6v, 12h, 6v, 12h), fuschia), ((4v, 12h, 4v, 12h), green), ((3v, 21h, 3v, 21h), fuschia), ((3v, 17h, 3v, 17h), fuschia), ((2v, 15h, 2v, 15h), fuschia), ((8v, 16h, 13v, 20h), black), ((3v, 3h, 4v, 7h), black)}, [{((7v, 15h, 14v, 21h), yellow)}, {((9v, 16h, 13v, 20h), black)}, {((9v, 17h, 11v, 19h), fuschia)}, {((2v, 2h, 5v, 8h), teal), ((10v, 17h, 10v, 19h), black)}, {((8v, 16h, 8v, 20h), fuschia), ((4v, 3h, 4v, 7h), black), ((3v, 3h, 3v, 7h), green), ((12v, 17h, 12v, 19h), black)}, {((13v, 19h, 13v, 19h), fuschia), ((13v, 17h, 13v, 17h), fuschia), ((12v, 20h, 12v, 20h), fuschia), ((12v, 16h, 12v, 16h), fuschia), ((10v, 20h, 10v, 20h), fuschia), ((10v, 16h, 10v, 16h), fuschia), ((8v, 19h, 8v, 19h), black), ((8v, 17h, 8v, 17h), black), ((4v, 6h, 4v, 6h), green), ((4v, 4h, 4v, 4h), green), ((3v, 6h, 3v, 6h), black), ((3v, 4h, 3v, 4h), black), ((12v, 18h, 12v, 18h), fuschia), ((10v, 18h, 10v, 18h), fuschia)}])
(20v, 20h, {((11v, 10h, 14v, 18h), green), ((2v, 3h, 6v, 7h), red)}, {((9v, 20h, 9v, 20h), yellow), ((1v, 19h, 1v, 19h), teal), ((19v, 18h, 19v, 18h), yellow), ((18v, 12h, 18v, 12h), teal), ((18v, 3h, 18v, 3h), yellow), ((14v, 5h, 14v, 5h), teal), ((9v, 7h, 9v, 7h), yellow), ((8v, 15h, 8v, 15h), teal), ((8v, 2h, 8v, 2h), yellow), ((6v, 12h, 6v, 12h), yellow), ((4v, 18h, 4v, 18h), yellow), ((2v, 11h, 2v, 11h), teal), ((12v, 11h, 13v, 17h), black), ((3v, 4h, 5v, 6h), black)}, [{((2v, 3h, 6v, 7h), red)}, {((3v, 4h, 5v, 6h), teal)}, {((11v, 10h, 14v, 18h), green), ((3v, 5h, 5v, 5h), black)}, {((13v, 11h, 13v, 17h), black), ((12v, 11h, 12v, 17h), yellow), ((4v, 4h, 4v, 6h), black)}, {((13v, 16h, 13v, 16h), yellow), ((13v, 14h, 13v, 14h), yellow), ((13v, 12h, 13v, 12h), yellow), ((12v, 16h, 12v, 16h), black), ((12v, 14h, 12v, 14h), black), ((12v, 12h, 12v, 12h), black), ((4v, 5h, 4v, 5h), teal)}])
(12v, 20h, {((8v, 4h, 10v, 8h), teal), ((2v, 2h, 4v, 4h), blue)}, {((8v, 13h, 8v, 13h), red), ((5v, 16h, 5v, 16h), yellow), ((2v, 8h, 2v, 8h), red), ((9v, 5h, 9v, 7h), black), ((3v, 3h, 3v, 3h), black)}, [{((8v, 4h, 10v, 8h), teal)}, {((2v, 2h, 4v, 4h), blue), ((9v, 5h, 9v, 7h), red)}, {((9v, 6h, 9v, 6h), black), ((3v, 3h, 3v, 3h), yellow)}])
(22v, 26h, {((11v, 3h, 14v, 6h), red), ((10v, 12h, 17v, 22h), green), ((2v, 4h, 7v, 12h), blue)}, {((22v, 22h, 22v, 22h), grey), ((22v, 20h, 22v, 20h), grey), ((22v, 13h, 22v, 13h), yellow), ((22v, 6h, 22v, 6h), teal), ((17v, 26h, 17v, 26h), grey), ((11v, 1h, 11v, 1h), grey), ((7v, 1h, 7v, 1h), yellow), ((3v, 1h, 3v, 1h), grey), ((1v, 18h, 1v, 18h), yellow), ((1v, 2h, 1v, 2h), grey), ((21v, 19h, 21v, 19h), yellow), ((21v, 6h, 21v, 6h), grey), ((20v, 24h, 20v, 24h), yellow), ((20v, 14h, 20v, 14h), grey), ((20v, 11h, 20v, 11h), grey), ((20v, 2h, 20v, 2h), grey), ((19v, 20h, 19v, 20h), grey), ((19v, 16h, 19v, 16h), grey), ((19v, 3h, 19v, 3h), teal), ((18v, 8h, 18v, 8h), yellow), ((16v, 8h, 16v, 8h), grey), ((16v, 6h, 16v, 6h), grey), ((16v, 2h, 16v, 2h), yellow), ((13v, 25h, 13v, 25h), yellow), ((13v, 11h, 13v, 11h), grey), ((11v, 24h, 11v, 24h), grey), ((11v, 9h, 11v, 9h), yellow), ((10v, 4h, 10v, 4h), grey), ((9v, 8h, 9v, 8h), grey), ((8v, 25h, 8v, 25h), yellow), ((8v, 15h, 8v, 15h), grey), ((7v, 19h, 7v, 19h), yellow), ((6v, 22h, 6v, 22h), grey), ((6v, 15h, 6v, 15h), yellow), ((5v, 25h, 5v, 25h), grey), ((5v, 2h, 5v, 2h), grey), ((4v, 22h, 4v, 22h), yellow), ((4v, 17h, 4v, 17h), yellow), ((4v, 14h, 4v, 14h), grey), ((3v, 19h, 3v, 19h), grey), ((2v, 23h, 2v, 23h), grey), ((2v, 15h, 2v, 15h), grey), ((2v, 13h, 2v, 13h), grey), ((12v, 4h, 13v, 5h), black), ((11v, 13h, 16v, 21h), black), ((3v, 5h, 6v, 11h), black)}, ?)