Does anyone know of an app that will do this? (Flash lights on mode change)

[bobbles]

Personally I do not use or have tried it.
This may do what you want.

[RELEASE] The Flasher - Flash your lights based on several triggers

Introducing 'The Flasher' Flash your lights based on several triggers! Features: Triggers include: acceleration, button, contact, lock, moisture, motion, presence, switches and time! Each trigger can be set to activate when on/off, active/inactive, etc. based on type of trigger Flash options include: multiple devices, number of flashes, delay between on/off (speed), level and color Option to only flash between set times, or when in a certain mode Parent/Child App structure Create as many chi…