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void Bot::Walk(Direction direction)
{
    if(clock() - last_walk < 500) return;
    if(clock() - last_attack < 690) return;

    int xoff[4] = { 0, -1, 0, 1 };
    int yoff[4] = { 1, 0, -1, 0 };

    int walk_x = client.me->x;
    walk_x += xoff[(int)direction];
    int walk_y = client.me->y;
    walk_y += yoff[(int)direction];

    bool can_walk = true;
    if(!client.Walkable(walk_x, walk_y))
        can_walk = false;

    if(client.OccupiedByNPC(walk_x, walk_y))
        can_walk = false;

    bool ghost = false;

    if(can_walk && client.OccupiedByCharacter(walk_x, walk_y))
    {
        ghost = true;
    }
    else if(!can_walk)
    {
        return;
    }

    if(ghost && clock() - last_ghost_walk < 7000) // check if it can ghost walk
        return;

    client.Walk(direction, ghost); // it will replace WALK_PLAYER with WALK_SPEC if ghost == true

    last_walk = clock();
    if(ghost) last_ghost_walk = clock(); // update the time of last ghost walk
}