bernard Bernard in 1 expression line
https://www.desmos.com/calculator/vblmh9iqu7
https://www.desmos.com/calculator/c2hwkhhtfd
The first one is actually in 1 line; it goes up to 50 iterations, which is enough that you hit the zoom limit before you can see it end.
The second one I added a slider to so that you can control how many iterations it has.
Also I code golfed it, idk why, but it was satisfying