Chop

print("put an enderchest to the right of the tree")
print("slot 12 = bonemeal")
print("slot 13-16 = sapling")
print("type in anything and press enter to start")

io.read()

height = 0

function plant()

    slot = 13
    turtle.select(slot)
    while not turtle.place() do
        if slot > 17 then
            error()
        end
        turtle.select(slot)
        slot = slot + 1
    end
end

function grow()
    plant()
    turtle.back()
    plant()
    turtle.turnLeft()
    turtle.forward()
    turtle.turnRight()
    turtle.forward()
    plant()
    turtle.back()
    plant()
    turtle.select(12)
    turtle.place()
    turtle.select(1)
end

function chop()
    turtle.dig()
    turtle.forward()
    while turtle.digUp() do
        turtle.dig()
        turtle.up()
        height = height + 1
    end
    turtle.dig()
    turtle.turnRight()
    turtle.dig()
    turtle.forward()
    turtle.turnLeft()
    for x=1, height do
        turtle.dig()
        turtle.digDown()
        turtle.down()
    end
    turtle.dig()
    print("This tree was ".. height .." blocks tall!")
    height = 0
end

function dropOff()
    turtle.turnRight()
    slot = 1
    for x=1, 11 do
        turtle.select(slot)
        turtle.drop()
        slot = slot + 1
    end
    slot = 1
    turtle.turnLeft()
end

function sleeping()
    nap = 12
    for x=1, 11 do
        if nap < 10 then
            print("Waking up in  ".. nap .."min")
            sleep(60)
            nap = nap - 1
        else
            print("Waking up in ".. nap .."min")
            sleep(60)
            nap = nap - 1
        end
    end
    print("Time to get to work!")
end

while turtle.getItemCount(12) > 0 and (turtle.getItemCount(13) + turtle.getItemCount(14) + turtle.getItemCount(15) + turtle.getItemCount(16)) > 3 and turtle.getFuelLevel() > 150 do
    grow()
    chop()
    dropOff()
    sleeping()
end