Looping animation

- [Instructor] Expressions are a powerful way … to minimize the number of key frames … and loop in expressions. … In this movie we'll learn about these loop expressions, … In this example I've got my up right bass player, … and you can see that I have one layer here … isolated out, thanks to my shy layers. … So we can focus just on this rotation property. … Now I have four key frames here, … mainly to swing it from left to right. … But when I preview, … you can see that the action only happens once. … Now I can certainly duplicate … however, if I want to alter the animation, … now I have to contend with all those extra key frames. … Instead of doing that, … we're going to use the loop out expression … to repeat these four key frames over and over again. … Let's revert back to the beginning, … and I'll select my rotation property … you come over here to my graph editor, … and down here, under options … let's just make sure that we have Edit Value Graph enabled … as well as the Show Expression Editor. …