I'd like to share my experience from my role as a group leader, In one project I was tasked with responsive login form for my group.
At the time, we had no idea of how to develop it and we needed something special and different from the previous tasks. I took the lead on creating and developing form, choosing colors, fonts and background.
As a result, we were able to come up with a responsive and attractive login form and our project was the best from all groups. This experience taught me creative problem solving, team work and adapting to changing circumstances.