This is an experiment in multi-user live visual software running in Plask on a Raspberry Pi. A webpage with an HTML5 canvas painting surface is hosted from the Pi over a wireless network. The iPad can set additional global parameters over OSC using Lemur.
Anyone in the space can connect to the wifi network on their phone / tablet and send strokes to the screen. I tried to make it as easy as possible by running a DNS server on the Pi and spoofing the URL control, and put QR codes around with the SSID and webpage. This might be able to be improved by using a captive portal once connected to the network..
This work is inspired heavily by Golan Levin's Yellowtail:
Sorry about the bad lighting and camera shake..