This example shows a manual passenger-counting interface with a large numeric display, an INCREMENT button, and a SAVE button. The app tracks how many people have entered and logs previous entries in a running text string. Using plain JavaScript functions (`increment()` and `save()`), it updates the displayed count via `textContent` and resets the counter after each save. The visual design relies on CSS background styling with `background-image` and `background-size`, while the interface itself is built from static HTML buttons and headings without any external charting or data libraries.