Drawing a Hexagon in Processing

hexagon.pde

void hexagon(int x, int y, int edge_length) {

  float c = (float) edge_length;
  float a = .5 * c;
  float b = sin(radians(60)) * c;
  float xf = (float) x;
  float yf = (float) y;

  /* Fill with a color of your choice. */
  fill(0,174,239);

  beginShape();
  vertex(0 + xf,b + yf);
  vertex(a + xf,2 * b + yf);
  vertex(a + c + xf,2 * b + yf);
  vertex( 2 * c + xf,b + yf);
  vertex(a + c + xf,0 + yf);
  vertex(a + xf,0 + yf);
  endShape(CLOSE);
 
 
}