Emo circle

float y;
float speed = .5;

void setup() {
  size(500, 500);
  background(bg);
  noStroke();

  for (int i=0; i<lines.length; i++) {
    float _y = i*(height/num);
    lines[i]= new myLine(_y);
  }
}

void draw() {
  background(bg);
  fill(f);
  ellipse(width/2, height/2, 300, 300);
  for (int i=0; i<lines.length; i++) {
    lines[i].display();
  }
}
class myLine {
  float y;

  myLine(float _y) {
    y = _y;
  }

  void display() {
    strokeWeight(15);
    stroke(bg,80);
    y -= speed;
    if (y < 0) y = height;
    line(0, y, width, 10);
  }
}