tree

delay=0.05

while(true) do
    local success, ydata = turtle.inspect()
    if not success then
        ydata = {name=""}
    end
    while not (string.find(ydata.name,"sapling")==nil) do
        turtle.suck()
        success, ydata = turtle.inspect()
        if not success then
            ydata = {name=""}
        end
    end
    print("digging")
    while not turtle.forward() do
        turtle.dig()
        turtle.attack()
        print("sleep")
        sleep(delay)
    end
    print("moved forward")
    success, ydata = turtle.inspectUp()
    if not success then
        ydata = {name=""}
    end
    while not (string.find(ydata.name,"log")==nil) do
        while not turtle.up() do
            turtle.digUp()
            sleep(delay)
        end
        success, ydata = turtle.inspectUp()
        if not success then
            ydata = {name=""}
        end
    end
    print("mined oak")
    while not turtle.detectDown() do
        turtle.down()
    end
    print("moved down")
    turtle.back()
    saplingcount=0
    for i=1,16 do
        if turtle.getItemCount(i) > 0 then
            item=turtle.getItemDetail(i).name
            print(item)
            if not (string.find(item,"sapling")==nil) then
                if saplingcount>60 then
                    turtle.select(i)
                    while turtle.dropDown() == false and turtle.getItemCount() ~= 0 do -- Waits until turtle can deposit item
                        sleep(1)
                    end
                else
                    saplingcount=saplingcount+turtle.getItemCount(i)
                    turtle.select(i)
                    turtle.transferTo(1)
                end
            else
                turtle.select(i)
                while turtle.dropDown() == false and turtle.getItemCount() ~= 0 do -- Waits until turtle can deposit item
                    sleep(1)
                end
            end
        end
    end
    turtle.select(1)
    turtle.place()
end