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Guys in this lecture you're going to focus on how to write or add expressions without using the whip

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now you're going to get serious about the expression.

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Start writing them and see how barometers can work in an expression.

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Now there's the movement here of the circle comes over here.

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OK.

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And then the animation stops completely.

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That's pretty cool.

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Nice animation but then what happens if I want this bowl to continue being animated till the end of

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the composition without having to you know replicate the keyframes and if the composition goes longer

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I have to give frames.

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I suppose that this I want to use a simple expression.

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The expression I'm going to show you now is very useful and widely used.

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Let's come to the beginning here.

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And you wanted to add an expression to the position so it can continue playing the keyframes over here

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at the end of the composition so of course I press Alt click on the stopwatch and then there is the

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small arrow here.

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If I click on it comes to property there are here nice expressions such as the we will see about that

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there is the loop out.

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This is what we are going to use now and we see about the others later on.

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Let's take the loop out.

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And you notice the loop has a type which is cycle and number of keyframes number keyframes is set to

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zero.

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Well these are really not the paramita is just the syntax.

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You can just come and delete them.

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OK so we need all of them except the panties is no not this how loop out is spelled the O is uppercase.

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Please don't write it in small case it will make a mistake.

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The expressions are case sensitive and language sensitive.

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By the way.

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So now if you play the loop out we'll start playing the first keyframe after the last keyframe not happening.

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This is the Laskey frame the keyframe that displayed after all the motion that is played that is the

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first keyframe you see how it jumped without having any keyframes on the timeline.

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Of course.

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So the loop out will loop your keyframes from the last keyframe starting from the first one till the

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end of the composition

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so having the last keyframe you play the first keyframe Let's go back to the small arrow here and go

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to property and you have loop out here was a cycle a number of keyframes Let's try cycle and a couple

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of them fact there are only two in the cycle here you can replace it for example with Bing Bang.

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I put that black dots right being punk.

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This is one image is that you can change like this.

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I would delete the number of keyframes.

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OK if you don't care about it for now and even I can delete that type because this is just syntax and

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if you click out here you are if you play now the ping pong effect is that it does not continue from

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the first keyframe it continues from the previous keyframe.

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Notice how the ball when it comes to the end just overhear the previous keyframe.

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Let me show you now.

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So you are at the last frame the next motion that is played is the previous keyframe from the last one.

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Here you are.

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OK.

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Then you have the 30 frame or the fourth one and it's playing again.

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So actually it is now binging comes today and it will be bonding.

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OK if you like to so now this is pretty practical.

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Notice how the stuff is still moving with the loop out there is also the number of keyframes you remember

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there was a number.

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If you put a comma and there is a number you could ID I would add for example to at this point the pong

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will only play the last two keyframes because it's a loop out.

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So it's really work on the last keyframes.

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If you play here after the Laskey frame it plays the previous one then go back to the last one.

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You got this.

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Ok cool.

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So you have a very nice animation here.

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Imagine the things you can do of a card a planet.

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I don't know what so much even the characters that we have animated with the pen tool you can use the

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bank too.

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Let's try for example ping pong for you now.

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OK.

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So it's going to be cooler even if you are cancer the end and then goes back one that's the PVC keyframe

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then the first keyframe from the beginning.

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So this is the job of loop out and it's pretty useful please start using it.

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The other one we going to work on is the loop in fact come to property you have the loop in cycle and

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number of key frames.

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Let's just put the loop in.

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If you play like this there's not going to do anything because the loop in is the inverse of the loop

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out the loop it now works the other way.

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Let's go to the end of the composition by placing and select all out frames and click and drag them

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and stop them to the time line at the end.

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So the loop in we're starting from the last keyframe and then go back to the first keyframe.

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You are not this how it started playing and we don't have any keyframes yet.

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OK that's pretty good.

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Nyunt then emission you get created with a number of keyframes.

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Let's say we add two and it's going to be pretty cool if you are not this how it's playing them according

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to Time of course.

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Start with the first one.

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Second one comes back to the beginning and so on.

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Of course you can add here the Bing Bang.

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So I would write the pot being Bond

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and close the quads.

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And don't forget the comma here and here you are.

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I think it's OK.

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So not this what's happening let's go back to the beginning and you play it so it goes front and back

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from the beginning.

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OK.

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From the first key frames here and then it will continue.

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The last frame and notice how it's playing.

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Only the Tuki flame's loop in is the inverse of the loop out.

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Now this is very easy to use but showing it you do.

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The first time you might say oh wow this is difficult actually is so easy.

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Now the way to work is like this.

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Let's move this one.

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We don't want it.

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Select all the keyframes and just map them to the beginning here.

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I will come over here.

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Press alt or option the mark and click on the stopwatch and that type loop out.

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And here you are.

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You have your expression looping out everything not always you want to come to the arrow and pick the

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expression you can just click here and type it.

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Thank you very much for listening.

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I hope this was useful.

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Maybe it was fun.

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And now it's up to you.

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Start using the loop out.

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Thank you.

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I'll see you in the next lecture.