Poly

color bgcolor = color(0,0,0);

float p = 0;

void setup(){

  fullScreen();

  stroke(255,0,255);

  background(0);

}

float pd =3/2 ;r=5;

float ps = PI/pd;

void draw(){ 

  translate(width/2,height/2);

  for (int i =0;i<pd*2;i++){

  fill(0,0,0,100);

  rect(-10,-10-width+10,height+10);

  p+=ps;

  stroke(p,0,255-p/5);

  line(sin(p)*r,cos(p)*r, sin(p+ps)*(r),cos(p+ps)*(r));}

  r+=10;

}

void keyReleased(){

  //background(bgcolor);

}