I decided to change this up a bit after years of enjoyment. With the addition of a diode and an electrolytic capacitor, the LEDs now fade in and out instead of immediately turning on/off.
C1 is any 25V electrolytic capacitor between the values off 220uF and 470uF. The higher the value, the longer the fade in and out. I actually found 470uF to be bit much at almost 2 seconds, so recommend 220-330.
I'll post a video soon.
