Bjarki and Naes' Incredible Numerical Challenge (Part 1)

I actually struggled a bit with this 1. I had this idea of shaping the number 1 using snow on a dark background, but there was no snow for some time, and spring was pretty much around the corner. Then to my surprise and joy, the snow arrived. In the end i liked this version better (slightly photoshopped to fit the brief):


...but to give my original idea justice...