Sprite continuously changing

My student wants to code a sprite to change to a new one every second of his game. Is there a way he can do this to make it loop?

Change to a new what ? Sprite? Different image ? Something else ?

I think he wants to have the sprite say go from a orange to an apple to a strawberry but then it keeps repeating through the whole game.

Clock timer set to 1000ms
Set ImageSprite image from list of images (random or ordered)