#include <GL/glut.h>

void myinit(void)
{
 
/* attributes */

      glClearColor(1.0, 1.0, 1.0, 1.0); /* white background */
      glColor3f(1.0, 0.0, 0.0); /* draw in red */

/* set up viewing */
/* 512 x 512 window with origin lower left */

      glMatrixMode(GL_PROJECTION);
      glLoadIdentity();
      gluOrtho2D(0.0, 512.0, 0.0, 512.0);
      glMatrixMode(GL_MODELVIEW);
}

void display( void )
{

/* define a point data type */

    typedef GLfloat point[2];     

    point p; /* A point in 2-D space */

    int i, j, k;
    int red, green, blue;


    glClear(GL_COLOR_BUFFER_BIT);  /*clear the window */

    red   = 1;
    green = 0; 
    blue  = 0;

    glColor3f((float) red, 
              (float) green,
              (float) blue );

    /* define point */

    p[0] = 256; 
    p[1] = 256;
   
    /* plot new point */

        glBegin(GL_POINTS);
            glVertex2fv(p); 
        glEnd();
   


     glFlush(); /* clear buffers */

 }

void main(int argc, char** argv)
{

/* Standard GLUT initialization */

    glutInit(&argc,argv);
    glutInitDisplayMode (GLUT_SINGLE | GLUT_RGB); /* default, not needed */
    glutInitWindowSize(512,512); /* 512 x 512 pixel window */
    glutInitWindowPosition(0,0); /* place window top left on display */
    glutCreateWindow("This Space For Rent"); /* window title */
    glutDisplayFunc(display); /* display callback invoked when window opened */

    myinit(); /* set attributes */

    glutMainLoop(); /* enter event loop */
}