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// The Nature of Code// Daniel Shiffman// http://natureofcode.comlet walker;var r, g, b;let step = 5;function setup() { createCanvas(640, 360); walker = new Walker(); background(127);}function draw() { walker.walk(); walker.display(); walker.randomColor();}class Walker { constructor() { this.position = createVector(width / 2, height / 2); this.noff = createVector(random(1000), random(1000)); this.r = random(127); this.g = random(127); this.b = random(127); } display() { strokeWeight(2); fill(this.r, this.g, this.b); noStroke(); ellipse(this.position.x, this.position.y, 48, 48); } walk() { this.position.x = map(noise(this.noff.x), 0, 1, 0, width); this.position.y = map(noise(this.noff.y), 0, 1, 0, height); this.noff.add(0.01, 0.01, 0); } randomColor() { var count = floor(random(2)); switch (count) { case 0: if (this.r > -1 && this.r < 256) { this.r = this.r + floor(random(step)); } else if (this.r <= 0) { this.r = this.r + floor(random(step)); } else if (this.r >= 256) { this.r = this.r - floor(random(step)); } if (this.g > -1 && this.g < 256) { this.g = this.g + floor(random(step)); } else if (this.g <= 0) { this.g = this.g + floor(random(step)); } else if (this.g >= 256) { this.g = this.g - floor(random(step)); } if (this.b > -1 && this.b < 256) { this.b = this.b + floor(random(step)); } else if (this.b <= 0) { this.b = this.b + floor(random(step)); } else if (this.b >= 256) { this.b = this.b - floor(random(step)); } break; case 1: if (this.r > -1 && this.r < 256) { this.r = this.r - floor(random(step)); } else if (this.r <= 0) { this.r = this.r + floor(random(step)); } else if (this.r >= 256) { this.r = this.r - floor(random(step)); } if (this.g > -1 && this.g < 256) { this.g = this.g - floor(random(step)); } else if (this.g <= 0) { this.g = this.g + floor(random(step)); } else if (this.g >= 256) { this.g = this.g - floor(random(step)); } if (this.b > -1 && this.b < 256) { this.b = this.b - floor(random(step)); } else if (this.b <= 0) { this.b = this.b + floor(random(step)); } else if (this.b >= 256) { this.b = this.b - floor(random(step)); } break; } }}