NightLights      Go To Download Page

This paints a 20x20 field with nightlights, room lights, walls and mirrors.  Then you start the clock running either as constant time (hourglass moves) or as night-and-day (sunlight over Antarctica).  If you do night-and-day, you can roughly select latitude (i.e., length of night and rapidity of change).  If you select constant time, you can tweak the darkness manually.  Either way, darkness is indicated by the border around the field.

In response to the darkness, nightlights come on.  But since they are sensitive to light, they will be turned off by their own light if they are near a mirror, or near another nightlight that came on sooner.  They also have lifespans, and as they burn out they stop coming on, leaving room for others that had previously been suppressed, etc.  Refresh lifespans by clicking the flower, of course.  Adjust nitelight and room light lifespans with tombstone sliders, adjust brightness, reflectivity, sensitivity with sliders.  Click-drag to paint oblongs on the field and designate that space to be any of the possible components using the big buttons on the field's right edge.  Comes with a help file.

Totally useless.  I wrote it as an exercise in bit mapped graphics.  The blinking row at the screen bottom is in memory of the Univac mainframe processor clock readout, which I spent too much time watching while waiting for batch runs in the 1970's.