fountain

int num = 10000, frames=60;
float theta;
long rs;

void setup() {
  size(540, 540);
  rs = (long) random(23232323);
}

void draw() {
  randomSeed(rs);
  background(20);
  noStroke();
  translate(width/2, height/2);
  for (int i=0; i<num; i++) {
    pushMatrix();
    float r = random(TWO_PI);
    rotate(r);
    float s = 100;
    float d =  random(s, height*.35);
    if (random(1)>.9) d = random(s,height*.45);
    //if (random(1)>.97) d = random(s-50,s-10);
    float s2 = s + random(-10,10);
    float x = map(sin(theta+random(TWO_PI)), -1, 1, s2, d);
    float sz = random(1, 2);
    fill(255,150);
    ellipse(x, 0, sz, sz);
    //line(100,0,x,0);
    popMatrix();
  }
  theta += TWO_PI/frames;
  //if (frameCount<=frames) saveFrame("image-###.gif");
}