fellTree from Youtube tutorial

-- code featured in https://www.youtube.com/watch?v=EWN_mphyw9o

function getSaplings()
    -- return true/false if saplings are dug
    for index = 1, 4 do
        turtle.dig()
        turtle.turnRight()
    end
end

function plantSapling()
    -- if sapling present plant it
    if turtle.getItemCount(2) > 0 then
        turtle.up()
        turtle.select(2)
        if turtle.placeDown() then
            print("Sapling placed")
            turtle.back()
            turtle.down()
        else
            print("If you are hungry, I have an apple")
        end
    end
end

function main()
    -- clear screen
    term.clear()
    term.setCursorPos(1,1)
    print("Press Esc key. Starting in 2 secs")
    os.sleep(2)
    -- select slot 1
    turtle.select(1)
    turtle.dig()
    turtle.craft()
    turtle.refuel()
    turtle.forward()
    --move up and cut the tree
    while turtle.detectUp() == true do
        turtle.digUp()
        turtle.up()
        getSaplings()
    end
    -- reached tree top
    while turtle.detectDown() == false do
        turtle.down()
    end
    plantSapling()
end

main()