Glowing

The glowing pattern is a slow random pattern where the LEDs are turned on and off at a very slow rate.  Each LED gets a different random number for the speed which can be as fast as .5 seconds and as long as 3.5 seconds.  During half of the interval, the LEDs are slowly glowed to full brightness and then faded to darkness.  The only difference between this and the Blinking pattern is that the LEDs are turned glow on and off slowly.