test2 = {
  collisionbox = { 0, 0, 0, 0, 0, 0 },
  visual = "cube"
}

minetest.register_entity("default:test2", test2)


function attachments()
    prop = {
        mesh = "player.x",
        textures = {"player.png", },
        colors = {{255, 255, 255, 255}, },
        visual = "mesh",
        visual_size = {x=1, y=1},
    }

    local pos={x=0,y=0,z=0}
    local newobject=minetest.env:add_entity(pos, "default:test2")
    newobject:set_properties(prop)
    newobject:set_animations({x=1, y=50}, 35, 0)

    for _, obj in pairs(minetest.get_connected_players()) do
        if(obj:get_player_name() == "some_nick") then
            newobject:set_attachment(obj, "Bone", {x=0,y=0,z=0}, {x=0,y=0,z=0})
            print ("Attached test object to "..obj:get_player_name())
        end
    end
end