75 lines, 8 of them comments · 744 tokens, written in 40 seconds for $0.063

 1  let particles = [];
 2  let numParticles = 100;
 3  
 4  function setup() {
 5    createCanvas(windowWidth, windowHeight);
 6    colorMode(HSB, 360, 100, 100, 100);
 7    
 8    // Initialize particles
 9    for (let i = 0; i < numParticles; i++) {
10      particles.push(new Particle());
11    }
12  }
13  
14  function draw() {
15    // Semi-transparent background for trail effect
16    background(0, 0, 5, 10);
17    
18    // Update and display particles
19    for (let particle of particles) {
20      particle.update();
21      particle.display();
22    }
23  }
24  
25  class Particle {
26    constructor() {
27      this.x = random(width);
28      this.y = random(height);
29      this.size = random(2, 8);
30      this.hue = random(360);
31      this.noiseOffsetX = random(1000);
32      this.noiseOffsetY = random(1000);
33      this.speed = random(0.001, 0.003);
34    }
35    
36    update() {
37      // Use Perlin noise for smooth movement
38      let angle = noise(this.noiseOffsetX, this.noiseOffsetY) * TWO_PI * 2;
39      this.x += cos(angle) * 2;
40      this.y += sin(angle) * 2;
41      
42      // Update noise offsets
43      this.noiseOffsetX += this.speed;
44      this.noiseOffsetY += this.speed;
45      
46      // Wrap around edges
47      if (this.x < 0) this.x = width;
48      if (this.x > width) this.x = 0;
49      if (this.y < 0) this.y = height;
50      if (this.y > height) this.y = 0;
51      
52      // Slowly shift hue
53      this.hue = (this.hue + 0.5) % 360;
54    }
55    
56    display() {
57      noStroke();
58      fill(this.hue, 80, 100, 50);
59      ellipse(this.x, this.y, this.size);
60    }
61  }
62  
63  function windowResized() {
64    resizeCanvas(windowWidth, windowHeight);
65  }
66  
67  // Add particles on mouse click
68  function mousePressed() {
69    for (let i = 0; i < 5; i++) {
70      let p = new Particle();
71      p.x = mouseX + random(-20, 20);
72      p.y = mouseY + random(-20, 20);
73      particles.push(p);
74    }
75  }