Yes! Each horizontal row in the rectangles represents a participating device. The purple/blue rectangle that comes in first represents all the bytes of the commitments coming in. Since we constrain the size of the rectangle it makes (IMO) a cool visual effect as the rows squeeze to accommodate more data.

Each little square inside it represents a byte, so we map bytes (0..255) to colors ranging from a blue to a purple.

The matching secret is also 32 bytes, and of course those come in in random order, so we line up secret rows with the matching commitments. It sure is fun to watch.

We played with some different visualizetions. We actually had one version with a 3d sphere getting covered in data, but it felt too gimmicky. This gives a good feeling of people showing up.