carve

turtle.up()
direction = "r"
for i=1,16 do
    for j=1,16 do
        turtle.dig()
        turtle.digUp()
        turtle.digDown()
        turtle.forward()
    end
    if direction == "r" then
        turtle.turnRight()
        turtle.dig()
        turtle.digDown()
        turtle.digUp()
        turtle.forward()
        turtle.turnRight()
        direction = "l"
    else
        turtle.turnLeft()
        turtle.dig()
        turtle.forward()
        turtle.turnLeft()
        direction = "r"
    end

end