sun

float radius, theta, lx, ly, sz = 5;
int num = 120, step = 4, fc;
float[] scal = new float[num];
PVector[] dots = new PVector[num];
boolean save = false;

void setup() {
  size(500, 500);
  background(20);
  fill(#FFA41A);
  //noFill();
  stroke(#FFA41A);
  strokeWeight(1);
  strokeJoin(ROUND);
  radius = width*.25;

  createSpikeyThing();
}

void draw() {
  background(20);

  drawSpikeyThing();
  theta += 0.0523;

  if (save) {
  if (frameCount%4==0 && frameCount<fc+121) saveFrame("image-###.gif");
  }
}

void createSpikeyThing() {

  float angle = 3*PI/2;

  for (int i=0; i<num; i++) {
    if (i%(step)==0) {
      scal[i] = random(1.1, 1.4);
    }
    else {
      scal[i] = 1;
    }
    float px = width/2 + sin(angle)*radius*scal[i];
    float py = height/2 + cos(angle)*radius*scal[i];
    dots[i]= new PVector(px, py);
    angle+=TWO_PI/num;
  }
}

void drawSpikeyThing() {

  float c = 0;
  for (int i=0; i<num; i++) {
    if (i%(step)==0) {
      float s = map(sin(theta+(TWO_PI/step)*c), -1, 1, 1, 1.4);
      dots[i].x = width/2 + sin(3*PI/2 + i*(TWO_PI/num))*radius*scal[i]*s;
      dots[i].y = height/2 + cos(3*PI/2 + i*(TWO_PI/num))*radius*scal[i]*s;
      c++;
    }
  }

  beginShape();
  for (int i=0; i<num; i++) {
    if (i==0) vertex(dots[i].x, dots[i].y);
    vertex(dots[i].x, dots[i].y);
    if (i==num-1) vertex(dots[i].x, dots[i].y);
  }
  endShape(CLOSE);
}

void mouseReleased() {
  createSpikeyThing();
}

void keyPressed() {
  fc = frameCount;
  save = true;

}