Uploaded December 2025 | Updated September 2026, 3 weeks ago

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Steve gets all festive and tries to improve on the festive lights he built a mere 11 years ago...

Dr Steve Bagley is based at the University of Nottingham.

Computerphile is supported by Jane Street. Learn more about them (and exciting career opportunities) at: jane-st.co/computerphile

This video was filmed and edited by Sean Riley.

Computerphile is a sister project to Brady Haran's Numberphile. More at bradyharanblog.com