def acUpdate(delta_t):
    global someLabel
    ac.setBackgroundOpacity(appWindow, 0)
    rpm = ac.getCarState(0, acsys.CS.RPM)
    drivetrainspeed = ac.getCarState(0, acsys.CS.DriveTrainSpeed)
    dy = ac.getCarState(0, acsys.CS.DY)
    ac.setText(someLabel, str(round(rpm)) + "\n" + str(round(drivetrainspeed, 2)) + " / " + str(dy))