/* gcc -Wall -o test test.c -lGL -lglut */
#include <GL/gl.h>
#include <GL/glut.h>

void display()
{
    glClearColor (0.0, 0.0, 0.0, 0.0);
    glClear (GL_COLOR_BUFFER_BIT);

    glEnable (GL_LINE_STIPPLE);
    glLineStipple (1, 0xff); 

    glBegin(GL_LINES);
        glColor3f (1.0, 1.0, 1.0);
        glVertex2f (50.0, 125.0);
        glVertex2f (200.0 , 125.0);
    glEnd();
    glutSwapBuffers();
}

void reshape (int w, int h)
{
    glViewport (0, 0, (GLsizei) w, (GLsizei) h);
    glMatrixMode (GL_PROJECTION);
    glLoadIdentity ();
    gluOrtho2D (0.0, (GLdouble) w, 0.0, (GLdouble) h);
}

int main(int argc, char** argv)
{
    glutInit(&argc, argv);
    glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
    glutInitWindowSize (250, 250); 
    glutCreateWindow ("Test");
    glutDisplayFunc(display); 
    glutReshapeFunc(reshape);
    glutMainLoop();
    return 0;
}