Wee Flasher Led | by 2 Transistor

it's too easy also isn't costly just you need to :

Electronic Components:

2- pnp transistor BC 547 B

2- capacitor 47 μF / 16V

2- Resistor 470 Ohm

2- Resistor 3.9 kOhm

3- blue LED

3- red LED

1- Potentiometer 50KOhm

Step 1: Circuit Diagram

Step 2: PCB Diagram

Step 3: Operating the Circuit

Connect DC source 3 --12 V
Control flashing speed by Potentiometer switch