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function room_tile_clear(arg0)

{

    var __ind = arg0;

    if (room_exists(__ind) == false)

        return -1;

    var __currroom = layer_get_target_room();

    layer_set_target_room(__ind);

    var __layers = layer_get_all();

    var __numlayers = array_length_1d(__layers);

    for (var __i = 0; __i < __numlayers; __i++)

    {

        var __els = layer_get_all_elements(__layers[__i]);

        var __numels = array_length_1d(__els);

        for (var __j = 0; __j < __numels; __j++)

        {

            var __eltype = layer_get_element_type(__els[__j]);

            if (__eltype == 7)

                layer_tile_destroy(__els[__j]);

        }

    }

    layer_set_target_room(__currroom);

}