glLineWidth(2);
	glEnable (GL_LINE_STIPPLE);
    glLineStipple (1, -3644);
    glBegin (GL_LINE_STRIP);
    
	for(i= 0; i < 2; i++)
	{
		glColor3f(255,0, 0);
		glVertex2f (-2.5 + (i * 5.0), -5.0);
	}
    
	glEnd();