Tattoo

gistfile1.txt

void setup(){
  size (400,400);
  background (255);
  smooth();

  //Referene https://www.cut-the-knot.org/Curriculum/Geometry/KanizsaTriangle.jpg
  // Reference: http://philschatz.com/physics-book/resources/Figure_28_03_03a.jpg
}                

void draw(){
 
  translate (width/2, height/2);
  for (int i = 0 ; i < 10; i++){
   int xpos = 60;
  int ypos = 60;
    noFill();
    stroke(3);
   ellipse (-xpos, ypos,  20*i, 20*i); 
   ellipse (xpos, ypos,  20*i, 20*i);
   ellipse (0, -ypos+29,  20*i, 20*i);
   fill(255);
   noStroke();
   triangle(-xpos, ypos, xpos,ypos, 0, -ypos+29);
  
   
  }
  
 /* ellipse(-100, 100,120,120);
  ellipse(100, 100,120,120);
  ellipse(0, -100,120,120);
  fill(255);
  triangle(-100, 100, 100, 100, 0, -100); */
}