lumberjack

function fuel ()
    if turtle.getFuelLevel() == 0 then
        turtle.select(1)
        turtle.refuel(1)
    end
end

function chopUp ()
    height = 0
    while turtle.detectUp() do
        fuel()
        turtle.digUp()
        turtle.up()
        height = height+1
    end
    fuel()
    return height
end

function killTree()
    fuel()
    turtle.dig()
    turtle.forward()

    height = chopUp()

    while height > 0 do
        fuel()
        turtle.down()
        height = height-1
    end

    fuel()
    turtle.back()
    turtle.select(2)
    turtle.place()
end

function chill()
    turtle.select(2)
    while turtle.compare() do --Comparing the sapling in inventory to the sapling in front of it
        turtle.suck()
        turtle.turnRight()
        turtle.suck()
        turtle.turnRight()
        turtle.suck()
        turtle.turnRight()
        turtle.suck()
        turtle.turnRight()
        sleep(10.0)
    end
    killTree()
end

while true do
    chill()
end