--Ernte turtle
function turnDir()
    if dir=="right" then
        turtle.turnRight()
    else
        turtle.turnLeft()
    end
end

function Refuel()
    if turtle.getFuelLevel() <30 then
        turtle.forward()
        turtle.select(1)
        turtle.placeDown()
        turtle.refuel()
        turtle.back()
        turnDir()
    else
        turnDir()

    end
end

function Harvest()
    turtle.forward()
    while not turtle.detect() do
        turtle.digDown()
        turtle.forward()
    end
    turnDir()
    turtle.forward()
    turtle.forward()
    turnDir()
    while not turtle.detect() do
        turtle.digDown()
        turtle.forward()
    end
    turnDir()
    turtle.forward()
    turtle.select(2)
    for i=2, 16 do
        while turtle.getItemCount(2)>0 do
            turtle.dropDown()
        end
    end
    turtle.forward()
    Refuel()
    Harvest()
end

--Main Pr0gramm >_
print("Turn direction ?")
dir = tostring(read())
Harvest()