Statues

You may be looking for statue.

"Statues" was an Earth game played with a group of people. It involved people who would move when they weren't being looked at, but had to freeze once they were seen. Ace played the game with friends when she was younger. (PROSE: Shadowmind)

Dodo Chaplet played a version of "Musical Statues" in a trap set by the Celestial Toymaker. One of his dolls would play the violin while everyone danced, and as soon as the music stopped, everyone had to remain still. Any move meant they lost and were removed from the game. (PROSE: Murder in the Dark)