public override void Draw() {                                                    // Here‘s Where We Do All The Drawing            glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);                            // Clear Screen And Depth Buffer            glLoadIdentity();                                                            // Reset The Current Modelview Matrix            glTranslatef(0.0f, 0.0f, -6.0f);                                            // Move Into The Screen 6.0            glRotatef(angle, 0.0f, 1.0f, 0.0f);                                            // Rotate The Triangle On The Y Axis By angle            for(rot1 = 0; rot1 < 2; rot1++) {                                            // 2 Passes For Two Sets Of Triangles                glRotatef( 90.0f, 0.0f, 1.0f, 0.0f);                                    // Rotate 90 Degrees On The Y-Axis                glRotatef(180.0f, 1.0f, 0.0f, 0.0f);                                    // Rotate 180 Degress On The X-Axis                for(rot2 = 0; rot2 < 2; rot2++) {                                        // 2 Passes For Each Of The Sets, Draw Two Triangles                    glRotatef(180.0f, 0.0f, 1.0f, 0.0f);                                // Rotate 180 Degrees On The Y-Axis                    glBegin(GL_TRIANGLES);                                                // Begin Drawing Triangles                    glColor3f(1.0f, 0.0f, 0.0f);  glVertex3f( 0.0f,  1.0f, 0.0f);        // Draw The Red Vertex                    glColor3f(0.0f, 1.0f, 0.0f);  glVertex3f(-1.0f, -1.0f, 1.0f);        // Draw The Green Vertex                    glColor3f(0.0f, 0.0f, 1.0f);  glVertex3f( 1.0f, -1.0f, 1.0f);        // Draw The Blue Vertex                    glEnd ();                                                            // Done Drawing Triangles                }            }            angle += 0.2f;                                                                // Update angle            glFlush();                                                                    // Flush The GL Rendering Pipeline        }