-- private use of Pirmax's ComputerCraft Turtle code of a tree farm

while true do

turtle.select(16)
if turtle.compareDown() == true then
turtle.turnRight()
end

turtle.select(15)
if turtle.compareDown() == true then
    turtle.turnRight()
    --sleep(2)
    turtle.select(13)
    if turtle.compare() == true then
        i = 1
        while i <= 6 do
            turtle.select(3)
            turtle.dig()
            turtle.select(2)
            turtle.digUp()
            turtle.up()
            i = i + 1
        end
        i = 1
        while i <= 6 do
            turtle.down()
            i = i + 1
        end
    end
    turtle.select(2)
    turtle.place()
    turtle.turnLeft()
end

if turtle.getFuelAmount() <= 200 then
    print("Il manque du carburant !")
    turtle.select(10)
    turtle.placeUp()

    for i = 3, 12 do
        turtle.select(i)
        turtle.dropUp()
    end

    turtle.select(16)
    turtle.dropUp()
    turtle.select(15)
    turtle.dropUp()
    turtle.select(14)
    turtle.dropUp()
    turtle.select(13)
    turtle.dropUp()

    turtle.select(2)
    turtle.dropUp()

    turtle.select(1)
    turtle.suckUp(16)
    turtle.craft()
    turtle.refuel(64)

    -- Process inverse

    for i = 3, 12 do
        turtle.select(i)
        turtle.suckUp()
    end

    turtle.select(16)
    turtle.suckUp()
    turtle.select(15)
    turtle.suckUp()
    turtle.select(14)
    turtle.suckUp()
    turtle.select(13)
    turtle.suckUp()

    turtle.select(2)
    turtle.suckUp()

    turtle.select(10)
    turtle.digUp()
end

turtle.select(14)
if turtle.compareDown() == true then
turtle.turnRight()
turtle.select(3)
turtle.drop()
turtle.turnLeft()
end

turtle.forward()

end