How to simplify my code

I have a code,where i have an array of audioclips,and keycodes. So i want to select a keycode for each audio clip. Like if i press “keycode[0]”,it plays audioClip[0],than keycode[1] => audioclip[1], keycode[2] =>audioclip[2], [3] =>[3], [4]=>[4],[5] =>[5]. Smth like that.
My tutor said that my code can be simplied,but how?