turtle refuelling

xSize = 10
ySize = 2
zSize = 10

function refuel()
    if turtle.getItemCount(1) == 0 then
        print("Ran out of fuel :(")
        return false
    end

    if turtle.getFuelLevel() <= 0 then
        turtle.refuel(1)
        print("REFUELED")
        return true
    end

    return true
end

local running = true
while running do
    running = refuel()
    turtle.forward()
end