Obsidian tower breaker | The End

function cutUp()
    turtle.digUp()
    turtle.up()
end

function cutDown()
    turtle.digDown()
    turtle.down()
end

function run()
    local height = 0

    -- chop down the first block
    turtle.dig()
    turtle.forward() -- ]]

    while turtle.digUp()==true do
        turtle.dig()
        turtle.up()
        height = height + 1 --count height of the tree
    end

    turtle.dig()
    turtle.turnRight(); turtle.dig(); turtle.forward(); turtle.turnLeft()
    turtle.dig()

    for i=1, height do
        cutDown()
        turtle.dig()
        turtle.turnRight(); turtle.dig(); turtle.turnLeft()
    end

    turtle.forward()
    turtle.dig()
    turtle.forward()
    turtle.turnLeft()
    turtle.dig()

    for i=1, height do
        cutUp()
        turtle.dig()
    end

    turtle.turnRight(); turtle.turnRight()
    turtle.dig(); turtle.forward()
    turtle.turnRight(); turtle.dig()

    for i=1, height do
        cutDown()
        turtle.dig()
    end

    print("Jobs done! Current height: " ..height)
end

run()