void exploreNorth(struct Node n, struct Path *p){
    fprintf(stderr,"start\n");
    struct Path *path = {NULL,0,0};
    fprintf(stderr,"%i %i\n",n.x,n.y);
    if(n.north == NULL){
        p = path;
        return;
    }
    fprintf(stderr,"pre\n");
    exploreNorth((*n.north),p->next);
    fprintf(stderr,"post\n");
    p->length = p->next->length + 1;
    p->dir = 0;
    fprintf(stderr,"end\n");
    return;
}