A 360° descent over the coral reef.
Move your phone to look around.
Reef Dive uses your phone's motion sensors (and Cardboard / VR). Scan this code with your phone's camera to dive in.
Motion & VR need HTTPS. A plain LAN link works for swipe;
for the gyroscope, run a tunnel (e.g. cloudflared) and paste its
https URL above — the code updates as you type.