YA ESTA TRIGUS ;)

#include <GL/glut.h>

void reshape(int widht, int height){
   glViewport(0,0,widht,height);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   glOrtho(-1,1,-1,1,-1,1);
   glMatrixMode(GL_MODELVIEW);
}

void display(){
   glClear(GL_COLOR_BUFFER_BIT);
   glColor3f(1.0, 1.0, 0.0);
   glLoadIdentity();
   glBegin(GL_TRIANGLES);
     glVertex3f(-1.0f, -1.0f, 0.0f);
     glVertex3f(1.0f, -1.0f, 0.0f);
     glVertex3f(0.0f, 1.0f, 0.0f);
      glColor3f(0.0f, 0.0f, 0.0f);
      glVertex3f(-0.5f,0.001f, 0.0f);
     glVertex3f(0.0f,-1.0f, 0.0f);
     glVertex3f(0.5f, 0.001f, 0.0f);
   glEnd();
   glFlush();
}

void init(){
   glClearColor(0,0,0,0);
}

int main(int argc, char **argv){
   glutInit(&argc, argv);
   glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
   glutInitWindowPosition(50,50);
   glutInitWindowSize(500,350);
   glutCreateWindow("TRIFORCE (ZELDA)");
   init();
   glutDisplayFunc(display);
   glutReshapeFunc(reshape);
   glutMainLoop();
   return 0;
}