So I want to make a booster that has a timer the booster gives 2X coins when they purchase it they have two options an 30 minutes option and a 1-hour option so I want to make so the timer gives them the 2x coins and then when its 0 then it stops giving them the boost but I don't get how I would make the timer to do that how I would increase the timer when they keep purchasing and then decrease over time.

Anonymous