local gpu = require("component").gpu

local gpu_set,gpu_BGC = gpu.set,gpu.setBackground
function char_color(input,color,x,y)
    local oldx = x
    for group in input:gmatch("[^\n]+") do
        for char in group:gmatch(".") do
            if color[char] then
                gpu_BGC(color[char])
                gpu.set(x,y," ")
            end
            x = x + 1
        end
        x = oldx
        y = y + 1
    end
end

local pattern = [[
0011001100
1111111111
0011111100
0000110000
]]

char_color(pattern,{["1"] = 0xFF0000},  1,1)