Playing with colors in the snow

Today, another school day, had a hard working mathematics marathon from 9a.m. to 3 p.m. But lets not waste more space with it.

So after the school, my brains needed some fresh air, but I was too tired to go for a walk or so, so I decided to pick a theme and work with it on my own courtyard.
I had two colourful balls of string that I played with against the snow.

Amilie