The rippling or chase effect on the ten LEDs is a beautiful and interesting sight, especially if they are mounted atop a nice wooden case and placed
in the living room. A nice conversation piece. The speed of the ripple or chase is controllable via R1 and R2, where a smaller R1 and R2 makes the ripple go faster. The “on” of each LED overlaps perfectly with no momentary “off,” so the ripple travels very smoothly.
Copyright by Bill Bytheway, K7TTY February 2012