Blow water lilies by blowing on your microphone ( old trick I know ).
WaterLilies now works online.
This my second try on processing, I was trying to understand class. The applet get slower after a moment but I already spend too much time on it, so I stopped there. A Class is like a object. A object have properties and/or behaviours. Like a glass for example. In processing you can create a model object ( class ), that you will use to create multiple independent objects based on the original model. I’m new to the subject so it’s best to read about object-oriented programmation here.