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// The Nature of Code Exercise 0.3// solution by Rick Sidwell// http://natureofcode.comlet walker;function setup() { createCanvas(640, 240); walker = new Walker(); background(255);}function draw() { walker.step(); walker.show();}class Walker { constructor() { this.x = width / 2; this.y = height / 2; } show() { stroke(0); point(this.x, this.y); } step() { const r = random(); if (r < 0.5) { if (r < 0.25) { if (this.x < mouseX) { this.x++; } else { this.x--; } } else { if (this.y < mouseY) { this.y++; } else { this.y--; } } } else { const choice = floor(random(4)); if (choice == 0) { this.x++; } else if (choice == 1) { this.x--; } else if (choice == 2) { this.y++; } else { this.y--; } } }}