TOEHOLD / PETAL EXCHANGE

A LITTLE WORLD OF MOLECULAR MACHINES

One strand in.
Another story out.

Trade tiny ribbons of light. Restore the chamber, one careful exchange at a time.

0exchanges
3gold route
YOUR FREE STRAND

Its right-hand key fits the
left-hand dock of a lit chamber.

○ Sun◇ Tide△ Leaf✦ Dusk
THE CHAMBER • restore each letter to its outline

YOUR FIELD NOTES

Eight small discoveries.

Your discoveries are saved on this device.

THE ART OF EXCHANGE

Follow the free strand.

Every ribbon has a left dock and a right key, shown as symbols and colours. You hold one free ribbon.

  1. Match your free ribbon’s right key to a chamber ribbon’s left dock. Matching chambers glow and say “Exchange”.
  2. Click that chamber (or press its number). Your ribbon moves in; its old ribbon becomes the new free strand.
  3. Restore A to chamber A, B to B, and so on. The spare ribbon belongs in your hand. A correct ribbon may need to leave again!

Every experiment has a verified route. Nudge highlights one next exchange on a shortest route from your current position. Undo is unlimited. Gold means finishing in the stated route length without a nudge; any finish earns a petal.

1–6 exchange · H nudge · U undo · R restart · N next · G guide · M sound

Progress stays in this browser. Sounds begin only when enabled. Select any experiment at any time. Recent DNA-origami research inspired the theme; the puzzle rules and artwork are original.