色がグラデーショナルに変化するスプレー

/**
* color spray
*
* @author aa_debdeb
* @date 2016/04/26
*/

color c1, c2;

void setup(){
  size(640, 640);
  frameRate(360);
  background(255);
  noStroke();
  c1 = color(random(255), random(255), random(255));
  c2 = color(random(255), random(255), random(255));
}

void draw(){
  
  if(mousePressed){
    for(int i = 0; i < 1000; i++){
      float radious = (1.0 - pow(random(1), 1.0 / 2.0)) * 100;
      float angle = random(TWO_PI);
      float v = 1.0 - (frameCount % 200) / 200.0;
      color c = color(red(c1) * v + red(c2) * (1.0 - v), green(c1) * v + green(c2) * (1.0 - v), blue(c1) * v + blue(c2) * (1.0 - v));
      fill(c, 10);
      ellipse(mouseX + radious * cos(angle), mouseY + radious * sin(angle), 1, 1);
    }  
    
    if(frameCount % 200 == 199){
      c1 = c2;
      c2 = color(random(255), random(255), random(255));
    }
  }

}