Infinite Path

while true do



    function check()
        turtle.select(1)
        if turtle.getItemCount() == 0 then
            turtle.select(16)
            turtle.place()
            turtle.select(1)
            turtle.suck()
            turtle.select(16)
            turtle.dig()
            turtle.select(1)
        end
        if turtle.getFuelLevel() == 0 then
            turtle.select(15)
            turtle.place()
            turtle.select(2)
            turtle.suck()
            turtle.select(15)
            turtle.dig()
            turtle.select(2)
            turtle.refuel()
        end
    end

    check()
    turtle.select(1)
    turtle.placeDown()
    turtle.forward()

end