// Drawing a set of radial lines using Trigonometry functions.

void setup() {
   size(500, 500);
   background(255);
   noLoop();
} // setup()

void draw() {
   int n = 50;
   float l = 200;
   float x1 = width/2, y1 = height/2;
   float x2, y2;
   float angle = 0.0;
   float delta = 2*PI/n;
   
   // Do n times
   for (int i = 1; i <= n; i = i + 1) {
      // draw a spoke
      x2 = x1 + l * cos(angle);
      y2 = y1 + l * sin(angle);
   
      line(x1, y1, x2, y2);
      angle = angle + delta;
   }
 } // draw()