Did you do this in your computer? Or did you use a Spirograph? I have the original version of that Kenner toy from the 1960s (the one with the push-pins - which would be banned in future editions of it), not to mention two Super Spirograph sets, which (when combined) can make even larger (and more complicated) patterns of this nature...

Still, that's a lovely and colorful) pattern you'd made there!

Sorry my computer has been fried. Anyways yes I made this when I had gotten bored. I made it on Photoshop.