The original Lake applet was created by David Griffiths.  
For many years it has provided a wonderful creative outlet for countless people.  
Now the next generation of that applet, the Janim applet, has been created by Roger Dillon 
and provides an incredible array of possibilities for use with images and animation.  
Both gentlemen are absolutely brilliant!  Salute!  
David Griffiths no longer maintains his lake applet website, but Roger Dillon's site is available here.