/*

  106. Arcs from the midpoints of two sides of the wall. (ACG 8).
  Black pencil.
  First Drawn by: SL
  Collection: Dr and Mrs Lorenzo
  Bonomo, Spoleto, Italy.
  August, 1971

  Implemented as software by Casey Reas <http://groupc.net>
  March, 2004
  Processing v.68 <http://processing.org>

*/

void setup()
{
  size(800, 600);
  ellipseMode(CENTER_RADIUS);
  noFill();
  background(255);
  stroke(0);
  //smooth();
}

void loop()
{
  background(255);
  int maximum_radius = int(dist(0, height/2, width, 0));
  int density = int(constrain(mouseX, 2, width));
  for(int i=density; i<=maximum_radius; i+=density) {
    ellipse(0, height/2, i, i);
    ellipse(width, height/2, i, i);
  }
}