glMatrixMode (GL_MODELVIEW);

   glColor3f (0.0, 0.0, 1.0);
   glRecti (50, 100, 200, 150);     // Display blue rectangle. 

   glColor3f (1.0, 0.0, 0.0);
   glTranslatef (-200.0, -50.0, 0.0); // Set translation parameters. 
   glRecti (50, 100, 200, 150);  // Display red, translated rectangle. 

   glLoadIdentity ( );              // Reset current matrix to identity. 
   glRotatef (90.0, 0.0, 0.0, 1.0); // Set 90-deg. rotation about z axis. 
   glRecti (50, 100, 200, 150);     // Display red, rotated rectangle. 

   glLoadIdentity ( );            // Reset current matrix to identity. 
   glScalef (-0.5, 1.0, 1.0);     // Set scale-reflection parameters. 
   glRecti (50, 100, 200, 150);   // Display red, transformed rectangle.