string-parsing.swift

        let tileString = "0100100000" +
                         "0111100110" +
                         "0111101010" +
                         "0001001000" +
                         "0011000100" +
                         "0011100010" +
                         "0011110010" +
                         "0011110010" +
                         "0001110010" +
                         "0011111100"
        tiles = [[Tile]]()
        for row in 1...height {
            var rowArray = [Tile]()
            for col in 0..<width {
                let indexVal = ((height - row) * width) + col
                let index = tileString.index(tileString.startIndex, offsetBy: indexVal)
                let character = tileString[index]
                let value = Int(String(character))!
                let tile = Tile(pos: (col, row), hidden: true, colorIndex: value)
                rowArray.append(tile)
            }
            tiles.append(rowArray)
        }