I have a box of icing tips for decoration that I haven’t used in some time. I pipe icing for cookie decoration at Panera Bread, but not much else. The cake (simply from a mix) was an excuse to expand on that.
As for the design, given that it’s Spring (as of this post), I thought flowers and leafy branches would be appropriate. Also, the colors of the flowers are those that my wife and I chose for our wedding.