It's a cool idea - I haven't seen it but I think that's how the time machine works in the movie Primer. You set the machine at time X, wait Y hours, then enter the machine and wait another Y hours to return to time X.
So true, I forgot this for a long time then dusted off the art supplies and started doing it again recently. So therapeutic watching a page fill up with drawings and doodles.
I won't say forevermore but no plans to open them at present. My priorities right now are experimenting and improving my art and I don't feel like commissions give me the freedom to do that.