Random Sound When Click?

Hi Unity Community iam making a game in unity 3d and playing around with some sounds. what iam trying todo its make a ramdom sound when click or move like in RTS or Moba iam more with modelling and sounds creations but weak with code my friend gave me this script but only works with one sound like move only playing one sound here its my question.
How do i make this script to work with select move or attack have a random sounds

thanks in advance enjoy the holiday
best regard
charay




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Random Sound When Click?