In this video, you'll get familiar
with Scratch, and create your own program
that tells the world about your favorite art.
Scratch is a programming language.
Programming languages allow computer scientists
to give computers instructions.
You're looking at Scratch's project editor
and a famous painting called the Mona Lisa.
In Scratch, characters and objects,
such as this image of the Mona Lisa,
are called sprites.
You will program sprites to do different things.
Today, you will program the Mona Lisa
to do something surprising.
You'll see that the instruction blocks you'll use
to create programs.
These blocks are arranged in color-coded categories,
like Motion and Looks.
One of the best ways to learn about Computer Science
is to explore and try new things.
While you're working in Scratch, if you see a block
that looks interesting, click on it
to see what it does.
Cool.
This block makes the sprite say Hello, for two seconds.
To select a block to use in your program,
click and drag it into the scripts area.
Many blocks, such as this one, have values
that you can change by clicking
on the whole bubble and typing.
For example, instead of saying Hello, for two seconds,
the Mona Lisa can say I love art for one second,
if you change the values.
To add another instruction to your program,
select a block, and drag it until it snaps
into the first instruction block.
The computer will read the instructions you create
to make the sprite do what you want it to do.
When the computer scientist tells the computer
to read and carry out instructions,
it is called Running the code.
These blocks run in the order they are stacked.
To run the stack of blocks, just click on it.
Cool.
This sprite says I love art, then moves 10 steps.
This block appears to go around other blocks,
so this example, we'll try that.
Oh wow, now this sprite says I love art
and moves over and over.
Now that you've seen a brief introduction
on how to use Scratch, it's your turn to explore.
Your first project is to make the Mona Lisa,
a famous piece of art, do something surprising.
Click on the Scratch project tab you had opened previously,
and try out different blocks.
Most importantly, explore what you can do in Scratch,
and have fun.
Once you have a set of blocks you like,
you can add a when flag clicked block from the Events menu
to the top, so that the blocks will run
whenever someone clicks the flag.
This will make it easier for other people
to use your program.
