public class unbenannt {

    public static void main (String args[]) {


   double x = 512.0;
   double y = 512.0;
   double g = 0;   // Winkel



 // Koordinatensystem
 StdDraw.setXscale (0 , 1024.0) ;
 StdDraw.setYscale (0 , 1024.0) ;

       StdDraw.setPenColor(StdDraw.BLACK) ;
       StdDraw.filledSquare ( 0.0 , 0.0 , 1200.0 ) ;
       StdDraw.setPenColor(StdDraw.RED) ;


       while (true) {

  double b = Math.sin(g);
  double a = Math.cos(g)  ;


    StdDraw.setPenColor(StdDraw.RED) ;
    StdDraw.line (x,y ,b*512,-a*512);
         g = g + 0.2 ;



         StdDraw.setPenColor(StdDraw.BLACK);
         StdDraw.filledSquare(0.0 , 0.0 , 1200.0 );

         StdDraw.show(20) ;









       }






}




}