A backgammon set suspended midgame. Tents and folding picnic chairs dotted among the trees. A psychedelic dance floor with downtempo and chillout trance playing in the background as video screens show images of flushed, ecstatic young people moving to a silent beat.

The items, salvaged from the Oct. 7 “Tribe of Nova” trance festival at Re’im in southern Israel, are part of a new installation in a huge hangar at Tel Aviv’s exhibition grounds that recreates some of the essence of an event that was dedicated to peace and love but was shut down by barrages of rocket fire from Gaza.

In the horror that followed, hundreds of Hamas gunmen surged across the border and surrounded the music festival, ambushing people in their cars along the road and hunting them down as they fled across fields. At least 360 festivalgoers were slain that day, according to the Israeli authorities — nearly a third of the total killed in the Hamas-led assault. Others were taken to Gaza and are still being held hostage there.

The exhibit, which opened to the public for two weeks on Dec. 7, is titled “Nova 6.29” — for the moment, that morning around sunrise, when the music stopped.

“It shows the idea behind the community of Nova and tells the story of 6:29, when light turned to darkness,” said Yoni Feingold, an Israeli entertainment mogul and an initiator of the project. “It is a vast memorial for the nearly 400 who were killed.”