[HELP]Make the reward for any quest randomly

[QAU661]

HI everybody..im having a problem with cq_action when i tried to make the rewards for my event is in random mode.for example, the players need to collect luck token and after that they can exchange it with reward.the reward in random mode (maybe 4-5 items and depend on their luck). can someone teach me with cq_action to make the reward in random mode.
Thanx in advance.