ok, now I made a little patcher which generates random movement. After a while it stops and I don't know why. It is may be something silly. Can someone please take a look (sometimes it takes a minute or two until it stops)?
see line help "precise timing" tab. Maybe it's not directly related, but if you decrease grain time it won't stop. There is probably some quirk in how [line] decides if it finished. Maybe someone more knowledgeable can shed some light on this.