From a song to a room full of light.

Make the event

Give it a name. You get one join code and one QR code for the whole room, and a private link for yourself that runs the show. Guests never see that link, and nothing about it changes when you edit the show.

Decide how the room is split

You can leave the room as one, or ask a single question as people join. Their answers become the groups the show moves between — a wave that crosses the stands, two sides answering each other, three blocks lighting in turn.

• Pick one of a few Home or visitor, bride or groom, left / centre / right.
• A number, grouped into ranges "Which section are you in?" covers 1 to 999 without you typing out a single section.
• Pick several, or write something For questions you want the answers to rather than the grouping.

Say where the groups actually are — mixed through the crowd, two sides, or in order across the room — and the show uses the real geometry. A sweep goes left to right because the groups are left to right.

Pick the song

Choose a file from your device. It is decoded and analysed in your own browser — the audio never goes to the server. Wildlights finds the tempo and the beat grid, where the sections change, where the drop lands, and pulls the parts of the mix apart: the kick, the bass, the snare, the hats, the lead, the percussion.

That separation is what stops a show looking like random flashing. The bass can own one group while the hats stipple another, because they are genuinely different signals.

Choose how big it should feel

Six levels, from Ambient — a slow wash of colour that changes with the music — to Maximum, where the room is moving on every beat. The level changes how much happens, not how bright the room is: every level keeps a lit bed so the crowd stays visible.

Pick a palette, or save your own colours and reach for them at every event. Then set the flashing limit you are comfortable with.

Watch it back

The preview draws a room of phones and runs the actual show through the actual engine — the same code the phones run. Scrub through the song, watch the groups hand off, see the drop land. If a section is wrong, change the level or the colours and look again.

You can also send the show to one phone in your pocket to rehearse with, without any of the real audience seeing it.

Run it on the night

Show the code. As people join and answer, you can watch the room fill up and the groups balance. When the song starts, press play.

If the music is coming from a DJ, a band or a house PA rather than from you, let the host phone listen: it works out where in the song the room is and lines every phone up with it, correcting as it goes — even if the source is running a little fast or slow.

Through all of it you can light one group, take the whole room to a colour, or stop everything instantly.