Draw a head in processing

gistfile1.txt

  ////////////////////////Draw a head//////////////////////////////
  fill(100 + random(150), 100 + random(150), 100 + random(150));
  for ( int i = 0; i < numLines; ++i ) {
    beginShape();
    for ( float angle = 0; angle < 360; angle += step ) {
      float radian = radians( angle );
      x = xCenter + ( headXRadius * cos( radian ) ) + random(15);
      y = yCenter - ( headYRadius * sin( radian ) ) + random(20);
      
      if ( lastx > -999 ) {
        strokeSize += 0.05;
        strokeWeight( strokeSize );
        vertex( x, y );
      }
      
      lastx = x;
      lasty = y;
    }
    endShape();
    strokeSize = 1;
  }