It’s game on in about 3 minutes (less by the time you see this). For the uninitiated:

In the coming weeks, we’ll be hosting a series of live design events called Layer Tennis…
Two competitors will swap a file back and forth in real-time, adding to and embellishing the work. Each artist gets fifteen minutes to complete a “volley” and then we post it to the site live. A third participant, a writer, provides play-by-play commentary on the action, as it happens.

Enjoy!