Felling

local slot = 16
turtle.select(1)
local go = true

local function plant()
    if turtle.getItemCount(slot) > 1 then
        turtle.select(slot)
        turtle.place()
        turtle.select(1)

        return true
    end

    return false
end

local function done()
    while turtle.down() do end
    turtle.drop()
end

local function fell()
    while turtle.dig() do
        turtle.digUp()
        turtle.up()
    end

    done()
end

local function check()
    turtle.select(slot)
    local test = turtle.compare()
    turtle.select(1)
    if not test then

        return true
    end
    return false
end

while go do

    sleep(10)
    if check() then
        fell()
        go = plant()
    end
end