Some time ago I played a bit with elm and made this: http://share-elm.com/sprout/5467ef7de4b00800031feadf http://share-elm.com/sprout/5467ef7de4b00800031feadf,

Some time ago I played a bit with elm and made this: http://share-elm.com/sprout/5467ef7de4b00800031feadf http://share-elm.com/sprout/5467ef7de4b00800031feadf, not a simulation of course but the effect it's nice. It's cool to see an actual simulation, now. Well done.