Contest prize: Leonhard Euler

This is a 3rd-prize-request given to me from for attaining 3rd-place in the Christmas contest for the group

The 3rd-prize would be a lineart-picture and in this case it was to be one of the Swiss pioneer Leonhard Euler.
I did have quite fun making this I have to say

So there you go Congratulations to the 3rd-place and I hope you'll like it! If not then just contact me and I'll see if I can do something about it