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So the last thing I want to be able to do is to remove all of the dice that are placed onto our sceneView
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so that we can have a fresh start and put down as many dice as we need. So to do that, I'm going
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to add another bar button item.
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But while we're here, we might as well give our navigation bar a title as well.
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Let's call it ARDicee.
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And, of course, you can modify it if you like.
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But for now, I'm just going to drag on a bar button item and I'm going to link it up to an IBAction
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down here. And I'm going to call this IBAction,
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removeAllDice.
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Change that to an action, change the type to UIBarButtonItem, hit Connect.
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And, again, I'm going to use one of the system icons which is the one for Trash which is a good representation
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of deleting all of our dice.
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All right.
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So let's go into our ViewController and implement some code to delete all of those diceNodes from
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our scene.
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So, again, I'm going to say if diceArray.isEmpty is false, then we are going to loop through all
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the dice in the diceArray. And we are going to remove each of these nodes from the parent node, so 
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removeFromParentNode.
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All right.
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Now, if we run our app, you can see it in its full glory.
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And there you have it.
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You've created a 3D dice app in augmented reality.
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So in the next lesson, which is optional, I'm going to tidy up the code a bit and refactor some of the
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methods.
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This will just make it shorter, make it cleaner, make it more readable.
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Now, there's nothing new that's happening there,
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so it's completely optional for you to watch.
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If you just wanted to create the dice and wanted to go and mess around with ARKit and try to do some
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other things rendering other 3D objects into your world, then go ahead and do that.
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So I hope you enjoy this tutorial on ARKit.
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See you next time.