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Skillshare: http://skl.sh/stevemould
Free 2 months premium membership: YTSTEVE

Thanks to Brian Mackenwells for showing me this (@mackenwells). A laser shining on a mirror driven by a speaker creates cool patterns.

Here's the code for making sounds in your browser with keyboard shortcuts: https://gist.github.com/steventhebrave/7c16a72fb940b05b5e5218390418b5bf

Follow me on twitter here: http://twitter.com/moulds
Buy nerdy maths things here: http://mathsgear.co.uk