Currently, the cube's sides come together to form the cube, time passes, and then the cube explodes out of view. Your next task is to make the video cube spin in place really fast at certain times and slowly at other times. To do this, you'll animate the Null 1 layer, which you've already assigned as the parent to every cube side at the start of this chapter. As a result, the cube sides will inherit the Null 1 layer's keyframes (although no new keyframes appear in the Timeline for the cube sides' layers) and animate as one without disturbing the cube shape they form.
Follow these steps:
The keyframes you just created rotate the box ten times from the start of the animation to the end. Next you'll add keyframes so the box spins quickly and then slows down at various times: