What is a good psa for people who are trying to stop smoking
just make one up

You could show imagery of what really happens to people when they smoke too much for too long. Show the effects of gangrene disease, show the effects on the body of things like lung cancer/emphysema/throat cancer/oral cancer. Show people what happens when you smoke too much and need to get a stoma (a hole punctured into your throat) to be able to survive. Show people the real truth, the real effects of smoking, and show people all of the disturbing side effects that they will eventually get if they smoke/don’t quit for long enough. Just show people the honest truth, and be real with it, because sugarcoating things and not showing it all will help absolutely nobody.

I really hope this helps you out!! ^_^