The example visualizes the binary inputs and outputs of a Carel pco Board as a 9x4 grid of LED-like cells, with two rows for 18 inputs and two rows for 18 outputs. Built with plain HTML and CSS, the page uses flexbox for layout and styled `div` elements as indicators, with yellow highlighting on active cells. The code references specific board connections (C19-X4, C17-X2) via CSS IDs, showing a static snapshot of the device's state through a pcoWEB server interface.