<iframe width='500px' height='400px' src='https://nest.ktbyte.com/nest#117681' allowfullscreen></iframe>

float t;
float st;
float u;

void setup() {
    size(800,800);
    noStroke();
    fill(0);
    t = 0.0;
    frameRate(60);
    st = 1;
    u = 0.0;
}



void draw() {
    t += st * 0.02;
    u += 0.02;
    if (t > 3) {
        st = -1;
        t = 3;
    } else if (t < 0) {
        st = 1;
        t = 0;
    }

    background(255);
    for (float i = 0; i < 2 * PI; i += 0.01) {
        float r = cos(3 * i / 2 + u) * cos(3 * i / 2 + u) * width * 1.0 / 9 * t;
        float x = width * 1.0 / 35 * (10 - t) * cos(i) + width * 1.0 / 2;
        float y = width * 1.0 / 35 * (10 - t) * sin(i) + height * 1.0 / 2;
        ellipse(x, y, r, r);
    }
}