A long time ago, it was made out of paper. Patterned paper or coloured paper. And it was put on walls.

It didn't sound like anything. You saw it, but you didn't hear it. Of course, that was very distracting, but it was a long time ago and the people were primitive.

As for sounds, they had to make those themselves, with things carved from wood, or made from metal. Even with their voices.

It is common knowledge that, before wallpaper (or rather, when wallpaper was merely paper stuck on walls) people were unhappy much of the time. The regulation of emotions with constant sound is one of the great breakthroughs of modern times.

So why do you feel so nostalgic for that past you never knew, and why does your body refuse to be regulated?