Use the Easy Java Simulations Modeling and Authoring Tool to edit and to explore the source code for the One Dimensional Wave Superposition JS Model.

Changes:

recreate on a fresh ejss using codes from http://www.compadre.org/osp/items/detail.cfm?ID=13014
use design ideas from http://weelookang.blogspot.com/2010/06/open-source-ejs-superposition-of-2.html
Area of improvement:

cannot figure out how to make a dot that travels on the  f(x,t) and  g(x,t)

a remix version with dots to focus the visualization for novice learners.
enjoy!