Denne kjører ganske mye bedre i Processing-programmet enn på nettsida.

Particle[] particles = new Particle[5000]; void setup() { size(600, 400); for(int i = 0; i < particles.length; i++) { particles[i] = new Particle(random(width), random(height), random(20)-10, random(20)-10); } fill(255); stroke(255); noSmooth(); } void draw() { background(0); for(Particle p : particles) { p.ox = p.x; p.oy = p.y; p.x += p.vx; p.y += p.vy; if (p.x < 0) { p.x = 0; p.vx *= -1; } if (p.y < 0) { p.y = 0; p.vy *= -1; } if (p.x > width) { p.x = width; p.vx *= -1; } if (p.y > height) { p.y = height; p.vy *= -1; } p.vx *= 0.98; p.vy *= 0.98; line(p.ox, p.oy, p.x, p.y); } } void mousePressed() { float a = 5; for (Particle p : particles) { float distance = dist(p.x, p.y, mouseX, mouseY); p.vx -= a / distance * (p.x - mouseX); p.vy -= a / distance * (p.y - mouseY); } } class Particle { float x; float y; float ox = 0.0; float oy = 0.0; float vx; float vy; Particle(float x, float y, float vx, float vy) { this.x = x; this.y = y; this.vx = vx; this.vy = vy; } }