Cool program

Circlezzz2.pde

void setup() {
  size(displayWidth,displayHeight);
  background(0);
  colorMode(HSB);
}

float angle = 0;
float col = 0;
float increment = 0.7;
float linelen = 10;

void draw() {
  for (int c = 0; c < 5; c++) {
    angle += 0.5; //(mouseX/width);
    if (angle > 360) angle = 0;
    col += 0.1; //(mouseY/(float)width)*4;
    if (col > 255) col = 0;
    
    strokeWeight(5);
    stroke(col,255,255);
    
    float tempa = angle;
    for (int i = 0; i < (width/linelen); i++) {
      float sx = sin(radians(tempa)) * i*linelen;
      float sy = cos(radians(tempa)) * i*linelen;
      float ex = sin(radians(tempa-increment)) * (i+1)*linelen;
      float ey = cos(radians(tempa-increment)) * (i+1)*linelen;
      line(width/2 + sx,height/2 + sy,width/2 + ex,height/2 + ey);
      tempa -= increment;
    }
    fill(0);
    noStroke();
    ellipse(width/2,height/2,20,20);
  }
}

void keyPressed() { background(0); }

boolean sketchFullScreen() { return true; }