#include <stdio.h>
#include <stdlib.h>
#include <GL/glut.h>

void afficher(void)
{
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();
	glOrtho(-1.0,1.0,-1.0,1.0,-1.0,1.0);
	glClearColor(0.0,0.0,0.0,0.0);
	glClear(GL_COLOR_BUFFER_BIT);
	glColor3f(1.0,1.0,1.0);
	glBegin(GL_POLYGON);
	glVertex2f(-0.7,-0.7);
	glVertex2f(-0.7, 0.7); 
	glVertex2f( 0.7, 0.7); 
	glVertex2f( 0.7,-0.7);
	glEnd();
	glFlush();
}


int main(int argc, char* argv[])
{
	glutInit(&argc, argv);
	glutInitDisplayMode(GLUT_SINGLE|GLUT_RGBA);

	int win = glutCreateWindow("glut");

	glutDisplayFunc(afficher);

	glutMainLoop();

	glutDestroyWindow(win);

	return EXIT_SUCCESS;
}