The polishes I used are all Zoya:
lighter pink: Kitridge
pink gitter: Harper
Here is little video of how you do this! I've done a pictorial of this before but never a video. Basically you just start with your base color, I only did one coat because it will be covered, and Rooney is opaque enough to be ok at one coat. Then you take your accent color and scrape off as much as possible off the brush and do light strokes in both directions until you get the desired look. I would recommend being a little more careful if you use a sparkly polish like I did to not get it on your skin! I had a heck of a time getting if off and still haven't gotten it all off!