У вашего броузера проблема в совместимости с HTML5
Several laser modules, a few cables, photodiodes, a set of resistors and Arduino Uno with a speaker is all what you need to build a laser harp - a popular instrument in late 80s.
Check out this link for step-by-step instructions with Arduino code: github.com/hicodeswarsaw/laser-harp
Tutorial by Joanna Skorupska and Karol Kisiel of Deloitte Digital.