Triangle Flower by Ira Greenberg.

Using rotate() and triangle() functions generate a pretty flower. Uncomment the line "// rotate(rot+=radians(spin));" in the triBlur() function for a nice variation.

Point[]p = new Point[3];
float shift = 1.0;
float fade = 0;
float fillCol = 0;
float rot = 0;
float spin = 0;

void setup(){
  size(200, 200);
  background(0);
  smooth();
  fade = 255.0/(width/2.0/shift);
  spin = 360.0/(width/2.0/shift);
  p[0] = new Point(-width/2, height/2);
  p[1] = new Point(width/2, height/2);
  p[2] = new Point(0, -height/2);
  noStroke();
  translate(width/2, height/2);
  triBlur();
}

void triBlur(){
  fill(fillCol);
  fillCol+=fade;
  rotate(spin);
  // another interesting variation: uncomment the line below 
  // rotate(rot+=radians(spin));
  triangle(p[0].x+=shift, p[0].y-=shift/2, p[1].x-=shift, p[1].y-=shift/2, p[2].x, p[2].y+=shift); 
  if(p[0].x<0){
    // recursive call
    triBlur();
  }
}