eclipse2

float unit, theta;
int num = 20;

void setup() {
  size(500, 500);
  unit = width/num;
  noStroke();
}

void draw() {
  background(0);
  for (int y=0; y<=num; y++) {
    for (int x=0; x<=num; x++) {
      float distance = dist(width/2, height/2, x*unit, y*unit);
      float offSet = map(distance, 0, sqrt(sq(width/2)+sq(height/2)), 0, TWO_PI);
      float sz = map(sin(theta+offSet), -1, 1, unit*.1, unit*.9);
      float start = map(sin(theta+offSet), -1, 1, 0, PI);
      float lerpAmount = map(distance, 0, width/2+height/2, 0, 1);
      color col = lerpColor(#FCE400, #C60C0C, lerpAmount);
      fill(col);
      if (y>num/2) {
        arc(x*unit, y*unit, sz, sz, start, start+PI);
      } else {
        arc(x*unit, y*unit, sz, sz, 0, start+PI);
      }
    }
  }
  theta -= 0.0523;
  //if (frameCount%2==0 && frameCount<121) saveFrame("image-###.gif");
}