Spirograph java in pgm

Spirograph.java

public class Spirograph

{

    public static void main(String[] args)

   {

        double R = Double.parseDouble(args[0]);

        double r = Double.parseDouble(args[1]);

        double a = Double.parseDouble(args[2]);

        StdDraw.setXscale(-300, +300);

        StdDraw.setYscale(-300, +300);

        StdDraw.clear(StdDraw.BLACK);

        for (double t = 0.0; t < 100; t += 0.01)

        {

            double x = (R+r) * Math.cos(t) - (r+a) * Math.cos(((R+r)/r)*t);

            double y = (R+r) * Math.sin(t) - (r+a) * Math.sin(((R+r)/r)*t);

            double degrees = -Math.toDegrees((R+r)/r)*t;

            StdDraw.picture(x, y, "earth.gif", degrees);

            StdDraw.rotate(+Math.toDegrees((R+r)/r)*t);

            StdDraw.show(20);

        }

      }

   }