circuit produces 12 different sequences including flashing, chasing, police lights and flicker.

This circuit uses the latest  TE555-5 LED FX chip from Talking Electronics. This 8-pin chip and drives 3 LEDs. The circuit can be assembled on matrix board.
The circuit produces 12 different sequences including flashing, chasing, police lights and flicker.
It also has a feature where you can create your own sequence and it will show each time the chip is turned on.