Laser

You are looking straight down on a black hole. Each beam is calculated exactly, step by step, through the real shape of space around a spinning black hole (the Kerr solution), in the flat plane you are looking at.

The black hole is ray-traced too: every pixel follows light down from far above through curved space. Its black shadow is exactly the size of the zone where your laser is caught (5.2 times the hole's mass, for a hole that is not spinning). The glowing ring is hot gas orbiting in the same plane as your laser; as you spin the hole, its inner edge moves in. (The picture bends light as for a still hole; the laser paths use the exact spinning-hole maths.)

Light does not follow the glowing disk you see in pictures. It goes straight, but straight is curved here. Close to the hole, at the photon ring, light can orbit. Aim just above or below that and the beam wraps around once, twice or more.

Spin the hole and space itself is dragged around with it. Beams going the same way as the spin can come closer before they are caught; beams going against it are caught sooner.

Seen from far away, light near the edge seems to slow and freeze. That is real too: from outside, nothing is ever seen to cross.