- glClearColor(0,0,0,0);
 -  glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);
 -  glLoadIdentity;
 -  glMatrixMode(GL_PROJECTION);
 -  glLoadIdentity;
 -  glOrtho(0, 800, 600, 0, -1, 1);
 -  glMatrixMode(GL_MODELVIEW);
 -  
 -  glpushmatrix;
 -  glcolor3f(1,0.5,0);
 -  glbegin(gl_quads);
 -   glvertex2f(0,600);
 -   glvertex2f(0,0);
 -   glvertex2f(800,0);
 -   glvertex2f(800,600);
 -  glend();
 -  glpopmatrix;
 -  glpushmatrix;
 -  gltranslatef(x,y,0);
 -  glcolor3f(0,0.5,1);
 -  glbegin(gl_triangles);
 -   glvertex2f(380,580);
 -   glvertex2f(400,540);
 -   glvertex2f(420,580);
 -  glend();
 -  glpopmatrix;
 

