glMatrixMode (GL_MODELVIEW);

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

   glPushMatrix ( );                // Make copy of identity (top) matrix. 
   glColor3f (1.0, 0.0, 0.0);       // Set current color to red. 

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

   glPopMatrix ( );                 // Throw away the translation matrix. 
   glPushMatrix ( );                // Make copy of identity (top) matrix. 

   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. 

   glPopMatrix ( );                 // Throw away the rotation matrix. 
   glScalef (-0.5, 1.0, 1.0);       // Set scale-reflection parameters. 
   glRecti (50, 100, 200, 150);     // Display red, transformed rectangle.