while true do
    while turtle.getFuelLevel() < 50 do
        turtle.turnLeft()
        turtle.select(1)
        turtle.refuel()
        turtle.suck(64)
        turtle.refuel()
        turtle.turnRight()
        os.sleep(.5)
    end
    turtle.turnRight()
    turtle.select(2)
    while turtle.getItemCount(2) < 4 do
        turtle.suck(1)
        os.sleep(.5)
    end
    turtle.turnLeft()
    turtle.select(3)
    while turtle.getItemCount(3) < 3 do
        turtle.suck(1)
        os.sleep(.5)
    end
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.up()
    turtle.up()
    turtle.forward()
    turtle.forward()
    turtle.down()
    turtle.select(2)
    turtle.placeDown()
    turtle.turnLeft()
    turtle.place()
    turtle.up()
    turtle.select(3)
    turtle.place()
    turtle.turnLeft()
    turtle.turnLeft()
    turtle.down()
    turtle.select(2)
    turtle.place()
    turtle.up()
    turtle.placeDown()
    turtle.select(3)
    turtle.place()
    turtle.turnRight()
    turtle.forward()
    turtle.turnRight()
    turtle.turnRight()
    turtle.place()
    turtle.turnRight()
    turtle.turnRight()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.forward()
    turtle.down()
    turtle.down()
    turtle.select(1)
    os.sleep(20)
end