Good afternoon, I am looking for help with the assembly of a circuit. I tell you, I am putting together some models of revell planes, and it happened to put the lights on the model. but I found several obstacles since I don't know anything about circuits. Also researching the web I found several circuits with NE555 the result was a dimmable intermittence, but it is not the result I am looking for ... What I'm looking for is a double flashing (double shot) with an interval of 1 second with 3 white LEDs, what I could find out is using an LM3909, I leave a video so you can better understand my search. in the minute 0:28 the desired flash is seen. Thank you very much for your help!