By reading the code and tweaking in (seeing the result in realtime) you should be able to learn how things work. Also, don't forget to checkout the rest of eff

By reading the code and tweaking in (seeing the result in realtime) you should be able to learn how things work. Also, don't forget to checkout the rest of effects [1], there are lots! :) [1] http://glsl.heroku.com/ http://glsl.heroku.com/