void * fctLanceur()
{
    while(1)
    {
        alarm(4);
        pause();
    }
}

void handlerSigAlarme(int sig)
{
        struct Balle *b;

        b = (struct Balle *) malloc (sizeof(struct Balle));

        do
        {
            b->ligne = rand()%13 + 1;
            b->colonne = rand()%28 + 1;
        }while(Terrain[b->ligne][b->colonne] == BALLE || Terrain[b->ligne][b->colonne] == ZONE);

        do
        {
            b->couleur = rand()%10;
        }while(b->couleur == BLANC || b->couleur == NOIR || b->couleur == GRIS);

        b->dir = rand()%2;

        pthread_create(&threadHandle, NULL, (void*(*)(void*))fctBalle,b);
}