WEBVTT

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-: Hello and welcome to level two

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of our self driving car AI game.

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All right, are you ready to take level two?

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Are you excited?

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Well, me too.

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Let's do this.

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As you can notice, I just quit the application

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but that's not a problem because we saved the last brain.

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So we're gonna go back to the app and load the last brain

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and this will have the last weights of the neural networks

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like, you know, it will have the last synapse of the brain

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so it will already know how to do the round trips

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between the airport and the downtown.

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But now we're taking on the challenge of passing level two.

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So as a reminder,

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level two is to still do the round trips, but by staying

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on a specific road that we will draw ourselves right now

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in this tutorial.

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So let's see if it can do that.

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Let's make this road simple, because then

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remember that level four is a highly complicated road.

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So for now, let's still be nice with our self-driving car.

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All right, so let's do this.

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It's already selected.

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I'm going to select that all over again

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and let's try to beat level two.

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There we go.

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It's doing the weird spinning first

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but that's because I didn't load it.

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Let's load the brain.

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And there we go.

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Now it should be okay.

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Yes it is.

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It's doing the round trips between the airport.

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There we go.

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And now the downtown.

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It's going to the downtown and perfect.

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And now doing the other round trips.

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All right, so that's level one.

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And now let's take care of level two.

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So I'm gonna draw a road,

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something like this.

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So let me think what to draw.

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It has to be simple.

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So what about something like this?

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I told you I'm not a very good architect

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but I'm trying to do something not too difficult

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something like that.

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What do you think?

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All right.

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So let's draw

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the other border of the road,

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you know, something like this.

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And there we go.

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All right, Pretty good.

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Well, that's a classic road, but okay, so it's in the road.

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Perfect. And so now the challenge is not to cross some sand.

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So here we go.

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First mistake, but it's gonna learn

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from this mistake and try not to do it again.

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If we actually save the brain

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we can see the mistake, probably yes.

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If we look at here, well, we see the mistakes it made here

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that's where it crossed some sand, probably.

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So there we go.

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Right now it's on the road

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and it's reaching the goals.

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Right now, it just reached the downtown

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and going back on the road to reach the airport.

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There we go.

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Perfect job.

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Well done.

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So it seems that level two is fast already

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Didn't take much time to do the training, so that's great.

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That's just great.

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We can take it at the next level now.

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Yes, indeed, the round trips looks perfect.

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We can still sense some bit of hesitation

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maybe we can still increase the temperature, but you know

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it's reaching the goals, it's staying on the road

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it's not crossing any sand.

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So that's definitely a self-driving car.

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So pretty exciting.

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But now I wanna make it more difficult

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for this self-driving car.

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We want to take it to level three, which will, oh

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here we go, a mistake.

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Sorry about that.

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I thought it was already a one game, but you know

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it can still make some mistake.

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Actually, if we save we can probably see

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a constant reward

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close to 0.1.

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There we go.

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And that's probably the mistake.

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But anyway, it's doing a great job right now.

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So we will take it to level three

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and the level three will be to draw some obstacles

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but some difficult obstacles for the car.

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And the car will have to find its way

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to the downtown and the airport by avoiding the obstacles.

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So it will be obstacles full of sand, of course,

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but it will have to avoid them and find the goals

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the airport and the downtown.

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So let's see if you can do that.

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And until next time, enjoy AI.

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(dramatic music)