This is another in the series of Lights Out, No One's Home. I used a small set of five LEDs, which flashed in different patterns. If you follow the lines, you can see how they appear and disappear at different intervals. (See the big picture.) Others in the series are done with color-changing LEDs, with more LEDs that don't blink and just a single LED.
I was struck by the clarity and radial symmetry of this knob the other morning, so here you go. For what it is worth, this is the knob you would see if you turn around from here or look in from here. Perhaps I need to stay at a different hotel the next time I travel to San Jose... (See the big picture.)
I did a couple of these a little while back, so I thought I would post another. Actually trying to draw something in the pitch black using only a small light certainly has its challenges, that's for sure. Then there's the realization that 15 seconds is a lot shorter than it sounds. (See the big picture.)