Previously if you wanted to create a micro-behaviour that wasn’t a straight-forward customisation of existing micro-behaviours you had two choices: (1) use the Netlogo code micro-behaviour or (2) author it on some public web site (wiki, blog, etc.). (1) was too limited and (2) was clumsy during development. The Behaviour Composer now has a new button ‘Create a new micro-behaviour’ that enables one to easily create new micro-behaviours hosted on the Modelling4All servers (aka as the Google App Engine). We don’t recommend its use for public (shared) micro-behaviours. But once the micro-behaviour is ready one can easily obtain the HTML to paste into another web site.