Headlight Issue!!
 

Hello i have an 04 tl and need help!
I have just recently notice that when i have my headlights set to turn off after 30sec of locking the doors, once the lights turn off they come back on again and start to flicker rapidly almost like a stobe light. all of the lights do this except for the fog lights. also this only happens if i leave the lights on the automatic turn off. if I turn them off manually there is not issue. if someone can please give me an idea of what might be goin on or knows what the issues is i would appreciate it.
thanks