void display()
{
	glColor3f(0.0, 0.0, 0.0);
	glClear(GL_COLOR_BUFFER_BIT);
	static GLint vertices[] = {175, 175,
		                   175, 150,
	                           250, 150,
				   250, 175};

	glEnableClientState(GL_VERTEX_ARRAY);
	glVertexPointer(2, GL_INT, 0, vertices);

	/*glBegin(GL_QUADS);                                    //this works fine
		glArrayElement(0);                              //but with this commented, no quad
		glArrayElement(1);                              //pops up... 
		glArrayElement(2);
		glArrayElement(3);
	glEnd();*/

	glDrawElements(GL_QUADS, 4, GL_UNSIGNED_INT, vertices);
	
	glFlush();
}