How do you hack roblox with a cheat engine

You download cheat engine and do some stuff, but it only works until you refresh the page or go to another. And that just changes how much it SAYS you have, so the amount of robux or tix you have changed it to will not be changed, it will just SAY it was changed. So in other words, it will SAY you got more tix or robux, but really, nothing will have changed except, it will say 200 tix or 200 robux, but it won't let you buy anything over the amount you had before. So doing that is a waste of time.