Sequence Echo

A sequence of shapes appears. Read it, hide it, and tap it back in order. Get it right and the next one is a shape longer; one wrong tap ends the run.

Nothing depends on colour or sound — every pad is a distinct shape with a name, so it plays the same muted, in public, or with a screen reader. It runs entirely on your device: 0 network requests, works offline. No ads, no account, nothing to buy, and no betting, money or prizes.

1. Focus the board — click it, or press Tab until it is focused.
2. Read the sequence. There is no timer.
3. Press Enter to hide it.
4. Tap it back — ← and → choose a pad, Enter presses it. Or click the pads.
5. Keep going. Each round adds one, up to fourteen.

How long a sequence can most people remember?

Around seven, give or take two, for material with no structure — and a shape sequence is exactly that. What moves the number is not memory capacity but encoding: people who name the shapes as they appear ("circle, square, square, triangle") are holding a short verbal phrase rather than four pictures, and verbal sequences are easier to rehearse.

Why shapes rather than four colours?

Because a memory game whose only signal is colour is unplayable for a colourblind player, and one whose only signal is sound is unplayable muted or by a deaf player. Shapes with names work for everyone, and cost nothing.

Why is there no timer on the reveal?

Because a timer would decide how long you get to read the sequence, which turns a memory task into a reading-speed test — and it would make the game unusable for anyone who needs the announcement read aloud. You decide when you are ready.

Does it work offline?

Yes. Once the page has loaded once, the whole game is on your device.

Is there any money, betting or in-app purchase in this?

None, and there never will be. No currency, nothing to buy, no lives to refill, no wager of any kind.

Can I play it with a keyboard or a screen reader?

Both, fully. The sequence is announced shape by shape, every pad has a name, and every action has a key.

Four pads, sequences from three to fourteen. Shapes may repeat, which is what makes the longer sequences genuinely hard rather than just longer.

Number Span is the same shape of task with digits, and Pair Flip tests placement rather than order.

Bookmark this page (Ctrl+D, or ⌘D on Mac) or install the app — it works offline the next time you need it.