CUBE

-- 0 - empty
-- 1 - black
-- 2 - red

art = {
    {
      {2, 1, 1, 2},
      {1, 0, 0, 1},
      {1, 0, 0, 1},
      {2, 1, 1, 2},
    },
    {
      {1, 0, 0, 1},
      {0, 0, 0, 0},
      {0, 0, 0, 0},
      {1, 0, 0, 1},
     },
     {
      {1, 0, 0, 1},
      {0, 0, 0, 0},
      {0, 0, 0, 0},
      {1, 0, 0, 1},
     },
     {
      {2, 1, 1, 2},
      {1, 0, 0, 1},
      {1, 0, 0, 1},
      {2, 1, 1, 2},

    }
}
for z = 1, #art do
    for y = 1, #art[z] do
        for x = 1, #art[z][y] do
          slot = art[z][y][x]
          if slot ~= 0 then
                turtle.select(slot)
                turtle.placeDown()
          end
          turtle.forward()
        end

        for i = 1, #art[z][y] do
          turtle.back()
        end
        turtle.turnRight()
        turtle.forward()
        turtle.turnLeft()
    end
    turtle.turnLeft()
    for n = 1, #art[z] do
       turtle.forward()
    end
    turtle.turnRight()
    turtle.up()
end