Mine

#include <SDL/SDL.h>#include <GL/gl.h>int main (int argc, char *argv[]) {  SDL_Event event;  float theta = 0.0f;   SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 8);  SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 8);  SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 8);  SDL_GL_SetAttribute(SDL_GL_BUFFER_SIZE, 32);  SDL_Init(SDL_INIT_VIDEO);  SDL_SetVideoMode(600, 300, 0, SDL_OPENGL | SDL_HWSURFACE | SDL_NOFRAME);  glViewPort(0, 0, 600, 300);  glClearColor(0.0f, 0.0f, 0.0f, 0.0f);  glClearDepth(1.0);  glDepthFunc(GL_LESS);  glEnable(GL_DEPTH_TEST);  glShadeMode(GL_SMOOTH);  glMatrixMode(GL_PROJECTION);  glMatrixMode(GL_MODELVIEW);  int done;  for (done = 0; !done;) {      glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);            glLoadIdentity();      glTranslatef(0.0f, 0.0f, 0.0f);      glRotate(theta, 0.0f, 0.0f, 1.0f);      glBegin(GL_TRIANGLES);      glColor3f(1.0f, 0.0f, 0.0f);      glVertex2f(0.0f, 1.0f);      glColor3f(0.0f, 1.0f, 0.0f);      glVertex2f(0.87f, -0.5f);      glColor3f(0.0f, 0.0f, 1.0f);      glVertex2f(-0.87f, -0.5);      glEnd();      theta += .5f;      SDL_GL_SwapBuffers();      SDL_PollEvent(&event);      if (event.key.keysym.sym = SDLK_ESCAPE) done = 1;  }}