noname

int circles=6, xStep=5, yStep=6;

float r = 30, theta, v;

​

void setup() {

  size(540, 540);

  smooth(8);

  noFill();

}

​

void draw() {

  background(20);

  drawCircle();

  drawLines();

  v+=0.25;

  //if (v<=yStep) saveFrame("image-###.gif");

  if (v==yStep) v=0;

}

​

void drawCircle() {

  stroke(255);

  strokeWeight(1);

  for (int i=0; i<circles; i++) {

    float d = (i+1)*r*2;

    float x = width/2+r*circles-r*(i+.5); 

    ellipse(x, height/2, d, d);

    float x2 = width/2-r*circles+r*(i+1.5); 

    if (i!=circles-1) arc(x2, height/2, d, d, PI, TWO_PI);

  }

}

​

void drawLines() {

    for (int y=0; y<height; y+=yStep) {

      stroke(20);

      strokeWeight(2);

      line(0, y+v, width, y+v);

    }

}

​