This macro will plot dots in the active drawing according to an equation for an
object called a "Strange Attractor". See
http://www.wfu.edu/~petrejh4/Attractor.htm
for a discussion of this subject. The equations used in this example were
developed by Clifford Pickover, and were adapted from code in the book
"Visual Basic Graphics Programming" by Rod Stephens. When you
start the macro, it will begin placing dots in the drawing based on the values
set in the configuration boxes. The attractor is drawn in 3D and you may rotate
and examine it as it is growing. Press the "Stop" button when you've
seen enough. To start a new attractor, it's best to clear the previous one
first. The fastest way to do this is to use the menu commands
"Edit|Clear|All"