By David Highfield

PITTSBURGH (KDKA) — An interactive piece of art using rays of light and music drew crowds on its debut Friday night in Market Square.

“Congregation” as it’s called, uses thermal technology to detect people who congregate below a tall crane, and then the light responds to the people.

Friday night people were holding hands, laughing and some were even dancing.

The display has been in the United Kingdom and China before, but this is its North American debut.

The artists who created it, Kit Monkman and Tom Wexler, are from the UK and say Pittsburgh’s Market Square is perfect for the installation.

Jeremy Waldrup, from the Pittsburgh Downtown Partnership, explained that the light reacts to the people’s movements because it uses technology that detects people’s body heat.

“Congregation” will be on display evenings through March 16.

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