e position
                    particle.x += particle.vx;
                    particle.y += particle.vy;
                    
                    // Wrap around edges
                    if (particle.x < 0) particle.x = this.canvas.width;
                    if (particle.x > this.canvas.width) particle.x = 0;
                    if (particle.y < 0) particle.y = this.canvas.height;
                    if (particle.y > this.canvas.height) particle.y = 0;
                    
                    // Draw partic