I was actually really impressed with myself! LOL
I used thick side-by-side swipes of Sinful Colors Black on Black and Orly Chica Boom then swirled them together with a largish needle.
I wasn't quite ready for a full-on Haloween look yet, so sadly it got removed... but I'll definitely be doing this look a bit later in the month! I also want to try neons, just because... : )