Here are points forming a straight line pattern, moving back and forth.
Another viewpoint shows up when clicking on the checkbox;
observe the paths of individual points for a surprise.
The velocity slider allows the user to change speed/direction.
This app is related to [url]http://www.geogebratube.org/material/show/id/155425[/url]
- idea from http://intothecontinuum.tumblr.com/post/58377152931/
in-last-weeks-post-we-saw-how-the-motion-of
