- Install the Processing Websockets library: In Processing, select Tools > Add Tool; click Libraries; search for Websockets, and install it.
- Run dotServer.
- Run dotClient.
In each sketch, two dots are drawn. The green dot is the latest position of the mouse over the client. The blue dot is the latest position of the mouse over the server.
The server must be started before the client. If you restart the server, quit and restart the client so that it can connect to the new server.
This uses the Websockets 0.1b library by Lasse Steenbock Vestergaard.