I have proposed a code for flashing regular lights in case of alarm trigger for the Cookbook area, but may be I did something wrong or it was not interested for that section, so I am post it here, may be somebody will need such a feature:
Pull: https://github.com/Mihai258/home-assistant.io/pulls
Code: https://github.com/Mihai258/home-assistant.io/blob/Mihai258-patch-1/source/_cookbook/Alarm_Flash_Light.yaml
Your PR should be opened against the upstream repository for the documentation at github.com/balloob/home-assistant.io/. At the moment you point your PR against your own fork.
Thank you, I am trying to correct this.
I move your automation to Examples for Flashing Lights
If you want to make fixes, changes, or add/remove parts:
https://github.com/balloob/home-assistant.io/tree/master/source/_cookbook/automation_flashing_lights.markdown