On this card I used a couple of blue and a couple of blue-violette Copics for the background. I alternated between each color air brushing layers until I had the look I wanted.
I used a uniball white pen to make a bunch of sporadic snow flakes(white dots). I used a polka dot piece of paper I had lying around to cut shapes that hopefully resembled curtains. I added a few tiny light blue rhinestones as twinkling stars.