Ghostfox

Hello people, i need a little help here. What i'm trying to do is a throne (chair) that will give a buff (spell) to anyone who sits on it, the problem is that i want the buff to be given after someone remain seated for 1 real life minute but i don't know how to do it. All i've managed to do is a chair which gives my spell to anyone who sit down and get up using the TempleBlesingScript. Thank you in advance for your help.