This may not be ideal or even 100% address what you want, but it works as a start. The M1 has a blink built in to Link 64. If you go to UPStart and create Link 64, then assign it to the Receive table of the lights you want to blink. Then go into RP and configure light address 256 as serial expander and on/off.
Now, when ever you turn light address 256 on, any UPB device that has link 64 in its receive table will begin to blink. When you turn light 256 off, they will stop blinking and go off.
An example use for this is to flash all lights during alarm which would a rule as simple as
WHENEVER ANY ALARM
TURN LIGHT 256 ON
Hope it helps...