This plugin implements timed drawing excercises. Each excercise challenges
the user to create a drawing within a self-chosen time limit. The reference
picture is displayed either as backdrop of the created image, or in a
separate window. When time has run out, the create image will be saved to
a dedicated session folder, and a new excercise will start. This repeats
until the number of excercises has reached the configured limit or the user
chooses to finish.

If you're interested, please have look:
https://www.dropbox.com/s/vf0b973h4vp4y ... 1.zip?dl=0
Edit: the previous version contained some debug code that I disabled in this one, and the action file was missing from that archive.

Oh, that's pretty nice!

This is awesome! Thank you very much for this; so easy to configure and use, and working perfectly on Linux.