Regarding the very cool challenge, it sounds like both teams will have a fun time thinking up ideas. Maybe we can have some fun coming up with ideas too.
As a start: since Leeds has a famous inventor heritage (as does Chicago according to wikipedia!) such as the amazing John Harrison born just a few miles away, and the fact they like lasers, how about a multi-beaglebone-synced lightshow in the form of clock hands, or a clock face, as a remembrance of him, that could be seen from the sky (maybe filmed from a propeller plane). It would take some co-ordination, but local govt may help out!
