function state_game_rolling()
    --- @type Die
    local die
    --- @type EventBus
    local event_bus

    local function roll_die()
        die.bouncing = true
        local rot = Tween.new(0.7, die, {
            angle = (die.angle + math.random(180,360))-- die.angle + (math.random()<.5 and 1 or -1)* math.random(270, 360)
        }, "outSine")
        local done = false
        repeat
            done = rot:update(dt)
            coroutine.yield()
        until done

        die.bouncing = false
        event_bus:emit(EVENT_SET_STEP, "placing")
    end

    ---@param self any
    ---@param _die Die
    ---@param _event_bus EventBus
    local _enter = function(self, _die, _event_bus)
        assert(_die, "states.game.rolling needs a die")
        assert(_event_bus, "states.game.rolling needs an event_bus")
        die = _die
        event_bus = _event_bus
        addcoroutine(roll_die)
    end

    local update = function(self)
    end

    return {
        _enter = _enter,
        update = update
    }
end