Coldplay’s “Fix You” comes to mind, no?  Click the image for the video to see how it works.

“Commissioned by Yamaguchi Center for Arts And Media (YCAM)
for their fifth anniversary, as part of the Yuda Art Project.
Supported by The British Council, Tokyo

‘Array’ is a field of columns set in the courtyard of the Chuya Nakahara
Memorial Museum in Southern Japan. The columns create a field of
light and sound which gently shifts in response to the viewers’ movements,
via a hidden network of ultrasonic sensors. Each column is lit by a pure,
shimmering white light. This forest of light light calls you in, and its response
to your movement invites you to explore. Inside the grid lives a spirit,
in the form of a single pure red light. This spirit is timid but often playful,
revealing itself boldly then disappearing.”

Source: UnitedVisualArtists