Pick a root and a shape — every place it lives on the fingerboard lights up, coloured by its role in the chord or scale. Tap any dot to hear it. The same note appears in many spots; that is the map a player carries in their head.
root
The colours are the secret: the root anchors everything, and the 3rd, 5th and 7th give a chord its character. Slide a shape up the neck and the colours travel with it — the pattern never changes, only the key.