Eight channel chaser

Joe is going to a fancy-dress party tomorrow and he wants to go as a mad scientist - he's building a kind of "mind probe" helmet and wanted a set of LEDs to chase - I dug out this circuit which is very simple - the NE555 pulses the dual 4-bit counter. When bit3 is pulsed high it flips over to the first bit of the second "nibble" and hence you get an eight-way chase. That's why pins 15 & 10 are strapped together on the CD4015. It works well - I hope the party is good!