implement own OpenGL code in script

I want to implement my own OpenGL code into a script as a busy loading screen of type How can I do that? is it possible?

this would be the code without window stuff etc...

glClear(GL_COLOR_BUFFER_BIT);
glClear(GL_STENCIL_BUFFER_BIT);

         glBegin(GL_POLYGON);

         glColor3f(1, 1, 1);
         glVertex2f(-1.0,-1.0);
         glColor3f(1, 1, 1);
         glVertex2f(-1.0,10.0);

         glColor3f(0, 0, 50.0);
         glVertex2f(10.0,10.0);
         glColor3f(0, 0, 50.0);
         glVertex2f(10.0, -1.0);

         glEnd();
         
         glPushMatrix();
         glRotatef(theta, 0.0f, 0.0f, 0.0f); 

         glBegin (GL_QUADS);
         glColor3f (1, 0, 2); glVertex2f (0,0);
         glColor3f (1, 0, 2); glVertex2f (0,1);
         glColor3f (1, 0, 2); glVertex2f (1,1);
         glColor3f (1, 0, 2); glVertex2f (1,0);
         glEnd ();

         glBegin (GL_QUADS);
         glColor3f (0, 1, 0); glVertex2f (0,0);
         glColor3f (0, 1, 0); glVertex2f (0,-1);
         glColor3f (0, 1, 0); glVertex2f (-1,-1);
         glColor3f (0, 1, 0); glVertex2f (-1,0);
         glEnd ();


         glPopMatrix();

         SwapBuffers(hDC);

         theta += 2.3f;
         Sleep (1);