You already know how a for-loop works, it seems; the top 5 would just be another loop, from 0 to 5.

As for shuffling the cards, how does one usually shuffle a deck? Split it in half, then combine them randomly. I might try popping each card from the deck individually and putting them in either array A or B. Then looping until array A and B are both empty, popping a card from either A or B each loop and pushing it back into the original array. You could randomly choose which array you pick from.