W = {
    {0,2,2,0,0,2,2,0},
    {2,3,3,2,2,3,3,2},
    {2,3,3,3,3,3,3,2},
    {2,3,3,3,3,3,3,2},
    {0,2,3,3,3,3,2,0},
    {0,0,2,3,3,2,0,0},
    {0,0,0,2,2,0,0,0}
}
for y = 1,#W do
    for x = 1,#W[y] do
      slot = W[y][x]
      if slot ~= 0 then
        turtle.select(slot)
        turtle.placeDown()
      end
      turtle.forward()
    end
    for a = 1,#W[y] do
       turtle.back()
    end
    turtle.turnLeft()
    turtle.forward()
    turtle.turnRight()
end