This example demonstrates a simple animated pattern of five pink rectangles, each with a random width, stacked vertically on a gray background. The sketch runs at five frames per second, causing the rectangle widths to change with every frame. It uses the p5.js library, specifically the `createCanvas`, `background`, `fill`, `rect`, and `random` functions within the `setup` and `draw` loop. The code does not load any external data; it generates all visual variation procedurally.