Newbie - app for lights and switches randomly for Vacation?

I’m a newbie and bought a few smart bulbs and switches to connect to the smartthings.
All is connected but how can I program random lights on/off, even a radio on/off - so it looks like people are home?
Is there an app for this?

There sure is. A couple, actually. And numerous discussions on the topic.

Search “vacation”.

Thanks for the reference. It looks like vacation director lights is whats recommended but can’t find out to download and install?
Any suggestions or links?
Thanks in advance for your help.

I think a lot use Vacation Director. The best thing to do for questions is to post in that thread.