pg.rawps("grestore\n");
double xx[]={300.0,350.0,400.0,350.0,300.0};
double yy[]={650.0,650.0,600.0,550.0,550.0};
double[] x=buildVector(xx),y=buildVector(yy);
pg.polyline(x,y,true,false,false);
pg.setcolor(255,0,0);
double xx2[]={450.0,500.0,550.0,500.0,450.0};
double yy2[]={650.0,650.0,600.0,550.0,550.0};
double[] x2=buildVector(xx2),y2=buildVector(yy2);