Remember my Advent Calendar Round-up and my mission to create one this year? Well, I finally finished it yesterday, just in time for December 1st. It's simple, minimal, with just enough festive sparkle. I had a blast making this, though next time I make these geometric shapes, I might have to try glue instead of double-sided tape because I had to keep reinforcing them with additional tape and you can still see gaps. I initially clustered them all together, which looks fantastic. However, I …