for layer = 1, 20 do
    for x = 1, 11 do
        for y = 1, 10 do
            turtle.dig()
            turtle.forward()
        end
        if x < 11 then
            if x % 2 == 1 then
                turtle.turnRight()
                turtle.dig()
                turtle.forward()
                turtle.turnRight()
            end
            if x % 2 == 0 then
                turtle.turnLeft()
                turtle.dig()
                turtle.forward()
                turtle.turnLeft();
            end
        end
        turtle.turnLeft()
        for returnToStart = 1, 11 do
            turtle.forward()
        end
        turtle.turnLeft()
        for returnToStart = 1, 11 do
            turtle.forward()
        end
    end
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.digDown()
    turtle.down()
end