int x = 50;
int u = 300;
float a = .2;

void setup() {
  size(300,300);
  background(0);
  fill(255,20);
  noStroke();
  smooth();
  noLoop();
}

void draw() {
  Curlicue (x, u, a);
}


void Curlicue(int xpos, int units, float angle) {
  translate(xpos, 0);
  for (int i = units; i > 0; i--) {
  bezier(xpos, 0, 500-xpos, xpos, 500, 500-xpos, 500, xpos);
  rotate(angle);
  }

}