public void drawInstructions(){
	  fill(getColours.Ink.getRGB());
	  PFont font = createFont("Droid Sans",12,true);
   	  textFont(font);
   	  textAlign(LEFT);
	  text("Press 'r' to take a screen shot",1010,630);
	  text("+/- to zoom in/out",1010,650);
	  text("0 to reset zoom",1010,670);
	  textAlign(CENTER);
  }