This is a very early experimental sketch for the concept which would eventually become the Liquid Light installation.
At that stage, one of the options Goldy Wu, Mela Sogono and I were playing with was to have a background image hidden on a pool of dark water. As the viewers interact with the video installation, they would "transfer energy" to the screen, which would then heat and start to bubble, as if boiling. The background image would therefore be progressively revealed in a playful and fun way.
This sketch has been fully implemented in Processing.