Dig.lua

function checkFuel()
    startlevel=turtle.getFuelLevel()
    if turtle.getFuelLevel() < 100 then
        turtle.select(1)
        turtle.refuel(1)
    endlevel=turtle.getFuelLevel()
    (endlevel-startlevel) = used

    print("Intial Fuel:" .. startlevel)
    print("New Fuel Level" .. endlevel)
end



checkFuel()