Although this is very similar it isnt it.

The one I used even had some of these wallpapers but a really easy UI and you could add your own wallpapers all through gui without terminal.

Starting to think i dreamed it but my wife insists I didnt shut up about it when I had it the first time.

Excuse yourself from whatever situation is overstimming you and take a beather my friend.

Look in to noise cancelling headphones or noise reducing ear plugs (brand name “loops”) as noise is a very common stim for ASD. My wife got a pair of bose noise cancelling headphones for christmas and its the best thing shes ever bought for her being able to just block out the world, relax and step away from the metaphorical edge.

Dont force yourself to stay in the situation without any sort of tools to help.