- What does your automation look like. Here are some pointers on formatting code in here: How to help us help you - or How to ask a good question.
- Did your automation trigger at all. You can look at the traces to see if it triggered, it will leave a trace.
TBH a easy automation is all you need to do this. You should always write an automation as the basis for your blueprint automations anyway. Makes it easier.
An automation for this would trigger when the light goes from any to on, delay like 5 seconds, and start up your random color script or actions.