relay flasher problem

Hey,

I have a remote central locking kit, that has no light flash output, and I wanted to add a light flash relay setup that would flash once for unlock, and twice for lock or vice versa.
I have checked the wires and have one wire that pulses positive when unlocked and another that will flash positive when locked. So with either one I can make a single flash no problems, but its making the other cause the indicator lamps to flash twice.

I havent seen any off the shelf relay that will allow me to do it, any ideas on wiring that up?

thanks all.