This example demonstrates a generative drawing of concentric circular targets rendered with P5.js, adapted from the P5.js “Functions” example. The sketch uses `createCanvas`, `background`, `noStroke`, `noLoop`, `fill`, and `ellipse` to draw three targets at varying positions, each composed of nested gray-scale circles. The code is structured to work with VizHub’s hot reloading by binding P5 instance functions and attaching `setup` and `draw` to the P5 instance.