biofuel

function suck()
    while true do
        for i=1,16 do
            turtle.suck()
    end
    turtle.turnRight()
    turtle.turnRight()
end

function transport()
    turtle.forward()
    turtle.turnRight()
    while not turtle.detect() do
        turtle.forward()
    end
    turtle.turnRight()
    while not turtle.detect() do
        turtle.up()
    end
    turtle.forward()
    turtle.forward()
    for i=1,16 do
        turtle.select(i)
        turtle.dropDown()
    end
end

function back()
    turtle.turnRight()
    turtle.turnRight()
    turtle.forward()
    turtle.forward()
    while not turtle.detectDown() do
        turtle.down()
    end
    turtle.turnLeft()
    while turtle.detectDown() do
        turtle.forward()
    end
    turtle.turnLeft()
    turtle.forward()
end

while true do
    suck()
    transport()
    back()
end