This example demonstrates a minimalist web page that pairs a red HTML block with a JavaScript-based memory system. The visualization shows how a custom `memory` object stores and retrieves key-value pairs, simulating a limited cache that forgets the oldest entries after 250 saves. The code uses plain JavaScript with no external libraries, relying on standard object properties and array methods like `shift()` and `push()` to manage memory. The page renders via a simple `index.html` file that loads `test.js`, which logs the stored data to the console. No charting or data-rendering APIs appear in the code.