## Scale-free networks

Simulations that operate over an arbitrary graph rather than in continuous space are also easy to construct using process-oriented modelling. *Scalefree* demonstrates the real-time construction of a scale-free network of processes and channels that could be used as the basis for another simulation.

In this model, a new node is added on each time step, and connected to two randomly-chosen other nodes. The choice of other nodes is weighted by the number of connections they already have, so well-connected nodes tend to become more well-connected. Bars are drawn around the outside of the network to show the number of connections on each node.