-: Hello and welcome to level two
of our self driving car AI game.
All right, are you ready to take level two?
Are you excited?
Well, me too.
Let's do this.
As you can notice, I just quit the application
but that's not a problem because we saved the last brain.
So we're gonna go back to the app and load the last brain
and this will have the last weights of the neural networks
like, you know, it will have the last synapse of the brain
so it will already know how to do the round trips
between the airport and the downtown.
But now we're taking on the challenge of passing level two.
So as a reminder,
level two is to still do the round trips, but by staying
on a specific road that we will draw ourselves right now
in this tutorial.
So let's see if it can do that.
Let's make this road simple, because then
remember that level four is a highly complicated road.
So for now, let's still be nice with our self-driving car.
All right, so let's do this.
It's already selected.
I'm going to select that all over again
and let's try to beat level two.
There we go.
It's doing the weird spinning first
but that's because I didn't load it.
Let's load the brain.
And there we go.
Now it should be okay.
Yes it is.
It's doing the round trips between the airport.
There we go.
And now the downtown.
It's going to the downtown and perfect.
And now doing the other round trips.
All right, so that's level one.
And now let's take care of level two.
So I'm gonna draw a road,
something like this.
So let me think what to draw.
It has to be simple.
So what about something like this?
I told you I'm not a very good architect
but I'm trying to do something not too difficult
something like that.
What do you think?
All right.
So let's draw
the other border of the road,
you know, something like this.
And there we go.
All right, Pretty good.
Well, that's a classic road, but okay, so it's in the road.
Perfect. And so now the challenge is not to cross some sand.
So here we go.
First mistake, but it's gonna learn
from this mistake and try not to do it again.
If we actually save the brain
we can see the mistake, probably yes.
If we look at here, well, we see the mistakes it made here
that's where it crossed some sand, probably.
So there we go.
Right now it's on the road
and it's reaching the goals.
Right now, it just reached the downtown
and going back on the road to reach the airport.
There we go.
Perfect job.
Well done.
So it seems that level two is fast already
Didn't take much time to do the training, so that's great.
That's just great.
We can take it at the next level now.
Yes, indeed, the round trips looks perfect.
We can still sense some bit of hesitation
maybe we can still increase the temperature, but you know
it's reaching the goals, it's staying on the road
it's not crossing any sand.
So that's definitely a self-driving car.
So pretty exciting.
But now I wanna make it more difficult
for this self-driving car.
We want to take it to level three, which will, oh
here we go, a mistake.
Sorry about that.
I thought it was already a one game, but you know
it can still make some mistake.
Actually, if we save we can probably see
a constant reward
close to 0.1.
There we go.
And that's probably the mistake.
But anyway, it's doing a great job right now.
So we will take it to level three
and the level three will be to draw some obstacles
but some difficult obstacles for the car.
And the car will have to find its way
to the downtown and the airport by avoiding the obstacles.
So it will be obstacles full of sand, of course,
but it will have to avoid them and find the goals
the airport and the downtown.
So let's see if you can do that.
And until next time, enjoy AI.
(dramatic music)