Built from nothing, layer by layer

Build one interactive web page: An empty desk is built up as you scroll: two monitors, a keyboard, a mouse and a small computer go in as bare circuit boards, tile by tile, and are closed up. Then the person is built at it: bone from the hips, nerves from the brain, blood from the heart, then muscle, skin and clothes, each layer spreading through the body from where it starts. Last, the screens switch on. Resting the pointer is an x-ray: bones and boards under whatever is there.

Set it on an invented business called Sampleton, with its own drawn or generated pictures and no one else's files. It suits: A founder or team page with a sense of humour, a product launch that wants to show what is inside, a studio's about page. Anything where how it is made is the story. Do not let it fail the way this kind of piece usually does: Layers that do not line up, or a front that jumps across a gap. Here every layer is an edit of the one photograph, measured to within 0.7px before use; each layer spreads along a shortest path inside the figure's outline, so it never jumps from an arm to the chest; and outside the figure and the kit the photograph itself shows throughout.

It must work with the keyboard, on a phone, with reduced motion respected and no text under 12px. Tell me which libraries you chose and why.