// Example program to show how to locate points using
   // Trif functions...
   void setup() {
   size(600, 600);
   background(255);
   noLoop();
   } // setup()

void draw() {
   float r = 200;
   float theta = 0.0;
   int N = 4;
   float delta = TWO_PI/N;
   
   pushMatrix();
   translate(width/2, height/2);
   fill(0);
   noStroke();
   circle(0, 0, 5);
   for (int i=1; i <= N; i++) {
   // Draw ith point
   float x = r*cos(theta);
   float y = r* sin(theta);
   fill(255, 0, 125);
   circle(x, y, 5);
   theta = theta + delta;
   }
   popMatrix();
   
   } // draw()