local id = nil
minetest.register_chatcommand("testps",{
    func = function(name, param)
        if id then
            minetest.delete_particlespawner(id)
            local answer = tostring(id) .. " removed"
            id = nil
            return true, answer
        end
        local player = minetest.get_player_by_name("singleplayer")
        if not player then
            return false, "no such player"
        end
        local look_dir = player:get_look_dir()
        local vel = {x=5*look_dir.x, y=5*look_dir.y, z=5*look_dir.z}
        local pos = player:get_pos()
        id = minetest.add_particlespawner({
            amount = 10,
            time = 0,
            minpos = pos,
            maxpos = pos,
            minvel = vel,
            maxvel = vel,
            minacc = {x=0,y=-9.,z=0},
            maxacc = {x=0,y=-9.,z=0},
            minexptime = 10,
            maxexptime = 10,
            minsize = 5,
            maxsize = 10,
            collisiondetection = true,
            collision_removal = false,
            --texture = "default_torch_animated.png",
            texture = "default_key.png",
            --[[
            animation = {
                type = "vertical_frames",
                aspect_w = 16, aspect_h = 16,
                length = 30.0
            },
            --]]
            --attached = player
        })
        return true, ""
    end})