const TOTAL = 900;

let particles = [];   

let innerSize = 20; // Adjusts core size

​

function setup() {

    createCanvas(windowWidth, windowHeight);

    for (let i = 0; i < TOTAL; i++) {

        particles.push({

            pos: createVector(width / 2, height / 2),

            dir: random(TWO_PI),

            speed: random(1, 4), // adjusts bloom speed

            color: color(random(255), random(255), random(255)),

            life: 255 

        });

    }

}

​

function draw() {

    background(0, 20); 

​

    // Inner core growth speed

    let mouseDist = dist(mouseX, mouseY, width / 2, height / 2);

    let growthRate = map(mouseDist, 0, width / 2, 0.005, 0.005);  

    innerSize += growthRate;

​

    drawingContext.filter = 'blur(20px)'; 

    fill(255, 150); 

    noStroke();

    circle(width / 2, height / 2, innerSize);

​

    drawingContext.filter = 'none';

​

    for (let i = 0; i < particles.length; i++) {

        let particle = particles[i]; // Renamed to 'particle'

​

        let centerPoint = createVector(width / 2, height / 2); 

        let force = p5.Vector.sub(centerPoint, particle.pos);

        force.setMag(0.05);

        particle.pos.add(force);

​

        // Mouse touch

        let mouse = createVector(mouseX, mouseY);

        let d = dist(particle.pos.x, particle.pos.y, mouse.x, mouse.y);

        if (d < 100) {

            let repel = p5.Vector.sub(particle.pos, mouse);

            repel.setMag(1);

            particle.pos.add(repel);

        }

​

        particle.pos.x += cos(particle.dir) * particle.speed;

        particle.pos.y += sin(particle.dir) * particle.speed;

​

        particle.life -= .8; // control bloom fade

        if (particle.life <= 0) {

            // Reset particle back to the center

            particle.pos = createVector(width / 2, height / 2);

            particle.life = 255;

        }

​

        fill(red(particle.color), green(particle.color), blue(particle.color), particle.life);

        noStroke();

        circle(particle.pos.x, particle.pos.y, 20); // Adjust particle thickness

​

    }

}