chopOne

function unload()
    turtle.back()
    for i = 3, 16 do
        turtle.select(i)
        turtle.dropDown()
    end
    turtle.select(1)
    turtle.forward()
end

function checkFull()
    if turtle.getItemCount(16) > 0 then
        unload()
    end
end

function move()
    turtle.dig()
    turtle.forward()
end

function chopUp()
    while turtle.detectUp() do
        turtle.digUp()
        turtle.up()
    end
end

function backDown()
    while not turtle.detectDown() do
        turtle.down()
    end
    turtle.back()
end

function placeSapling()
    turtle.select(2)
    turtle.place()
    turtle.select(1)
end

function reUp()
    if turtle.getItemCount(1) == 0 then
        turtle.select(1)
        turtle.suckDown()
    elseif turtle.getItemDetail(1).name ~= "minecraft:dye" then
        turtle.select(1)
        turtle.drop()
        turtle.suckDown()
    end
end

function treeGrew()
    local success, data = turtle.inspect()
    if success then
        if data.name == "ic2:rubber_wood" or data.name == "minecraft:log"then
            return true;
        else
            return false;
        end
    end
end

function growTree()
    repeat
        reUp()
        turtle.place()
    until treeGrew()
end


while true do
    growTree()
    move()
    chopUp()
    backDown()
    checkFull()
    placeSapling()
end