Making actions on Lines

I have decided to start of my letter creating using basic lines, and just having them like ‘stick’ letters. I have managed to write my name like this, but for this demonstration i am just showing you the letter N.
The next step i was trying to do was put an action on the letter N. I was trying to get my left mouse button on click to rotate the letter. What hapens though is my program compiles, but just shows up with a blue screen and no letter on it. Can someone advise me on my mistake please.
thanks

#include "stdafx.h"

#include "glut.h"
#include <stdlib.h>

static GLfloat spin = 0.0;


void init(void) 
{
    glClearColor (0.0, 0.0, 0.85, 0.0);  
	glShadeModel (GL_FLAT);


}
void reshape(int w, int h)
{
   glViewport (0, 0, (GLsizei) w, (GLsizei) h);
   glMatrixMode(GL_PROJECTION);
   glLoadIdentity();
   glOrtho(-50.0, 50.0, -50.0, 50.0, -1.0, 1.0);
   glMatrixMode(GL_MODELVIEW);
   glLoadIdentity();
}


void display(void)
{

   glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
   glMatrixMode(GL_MODELVIEW); //Switch to the drawing perspective
   glLoadIdentity(); //Reset the drawing perspective
  

   glColor3f (0.0, 0.0, 0.0);
   glLineWidth(3.0);

   glPushMatrix();
   glRotatef(spin, 0.0, 0.0, 1.0);

 glBegin(GL_LINES);  //LETTER N

   glVertex3f(50.0, 50.0, 0.0); 
   glVertex3f(50.0, 250.0, 0.0);

   glVertex3f(50.0, 250.0, 0.0);
   glVertex3f(80.0, 50.0, 0.0);
 
   glVertex3f(80.0, 50.0, 0.0);
   glVertex3f(80.0, 250.0, 0.0);

 glEnd();
 glPopMatrix();

 glutSwapBuffers(); 
}

void spinDisplay(void)
{
   spin = spin + 2.0;
   if (spin > 360.0)
      spin = spin - 360.0;
   glutPostRedisplay();
}

void mouse(int button, int state, int x, int y) 
{
   switch (button) {
      case GLUT_LEFT_BUTTON:
         if (state == GLUT_DOWN)
            glutIdleFunc(spinDisplay);
         break;
      case GLUT_MIDDLE_BUTTON:
      case GLUT_RIGHT_BUTTON:
         if (state == GLUT_DOWN)
            glutIdleFunc(NULL);
         break;
      default:
         break;
   }
}


void handleKeypress(unsigned char key, //The key that was pressed
                    int x, int y) {    //The current mouse coordinates
    switch (key) {
        case 27: //Escape key
            exit(0); //Exit the program
    }
}

int main(int argc, char** argv)
{
   glutInit(&argc, argv);
   glutInitDisplayMode (GLUT_DOUBLE | GLUT_RGB);
   glutInitWindowSize (700, 400); 
   glutInitWindowPosition (100, 100);
   glutCreateWindow (argv[0]);
   init ();
   glutDisplayFunc(display); 
   glutReshapeFunc(reshape); 
   glutMouseFunc(mouse);
   glutKeyboardFunc(handleKeypress);

   glutMainLoop();
   return 0;
}

You call glOrtho(-50.0, 50.0, -50.0, 50.0, -1.0, 1.0); which seem
to be 1) too small to view your letter entirely , 2) the min coords of your letter are 50 in each x and y coord and your viewport mapping range are [-50,50] for both x and y, so you are viewing below the letter. try glOrtho(-500.0, 500.0, -500.0, 500.0, -1.0, 1.0);

Kool, thats working great now. Just a couple of quick things if you dont mind.
Firstly,in my mouse action, i have

      case GLUT_MIDDLE_BUTTON:
      case GLUT_RIGHT_BUTTON:
         if (state == GLUT_DOWN)
            glutIdleFunc(NULL);

Instead of the spin stopping dead on the click of the right button, can i get it to go back to the original state instead?

My second question is whether it would be hard to produce a set of fireworks where when they explode, it will turn into my name.
cheers

1. This is very easy.
2. Seem a little harder but I will try it.

void stopDisplay(void)
{
  float EPSILON = 0.001;
  if(fabs(spin) > 2.0 + EPSILON)
  {
    spinDisplay();
    glutPostRedisplay();
  }
  else
  {
   glutIdleFunc(NULL);
  }
}
void mouse(int button, int state, int x, int y) 
{
  switch (button) {
    case GLUT_LEFT_BUTTON:
      if (state == GLUT_DOWN)
        glutIdleFunc(spinDisplay);
      break;
    case GLUT_MIDDLE_BUTTON:
    case GLUT_RIGHT_BUTTON:
      if (state == GLUT_DOWN)
        glutIdleFunc(stopDisplay);
      break;
    default:
      break;
  }
}