Looking for a countdown timer to be used with applying certain installations prior to reaching zero/no time left. I am not looking for a countup function. With this function I would like to be able to add time to it incase a user wants to increase the countdown timer, example being countdown timer of 60 minutes/1 hour, user wants to increase by 60 minutes/1 hour. The only information I have come across on the forums is for minutes and seconds only. Any helps/assistance in the right direction