How to mimic running lights, turn signals and hazards with LEDs for diecast model
simulate this circuit &ndash; Schematic created using CircuitLab

Diodes can be 1N4148 
Resistors X control brightness of flash
Resistors Y control brightness of running lights 

Get rid of that 1uF cap on the output of the timer IC in your schematic (or connect it to the control pin), or it will do evil things. 

The running lights will make D1, D2, D4, D5 a bit brighter during the flash, if that's objectionable, you can fix it by splitting the Y resistors into X and (Y-X)) and connecting the flash steering diodes to those junctions.







simulate this circuit