Blink Hue Bulbs in Color upon Presence Arrival

You can use a SmartApp from the community to make this work called The Flasher. You will need to install the SmartApp from the web to make this work I don’t think it is published on the mobile app (well I can’t find it)

You can add a new smartapp from the web and either add from Template and the app “The Flasher” is what you want or take the code from this post.

Once installed and published for yourself. You can add a rule that does virtually what you need. (Not sure about the different colour bit)

Happy to talk this though in more detail if you need it.