looping tre feller

function treeCompare()
    turtle.select(1)
    while true do
        if (turtle.compare()) then
          return
        end
        os.sleep(10)
    end
end

function cutTree()
    turtle.dig()
    turtle.forward()
    turtle.select(1)

    while turtle.compareUp() do
        turtle.digUp()
        turtle.up()
    end

    while turtle.detectDown() == false do
        turtle.down()
    end

    turtle.turnLeft()
    turtle.turnLeft()
end

function dropItems()
    turtle.select(1)
    turtle.drop(4)
    turtle.turnRight()
    turtle.turnRight()
    turtle.back()
    turtle.select(16)
    turtle.place(1)
    turtle.select(1)
end

while true do
    treeCompare()
    cutTree()
    dropItems()
  end