Sprites In Action

Now that you've learned
how to use Sprite Lab,

you're going to want to make

your program react

when someone plays
with it.

To do that, you're going to
use events.

Blocks like `when clicked` and
`while touches` are called event blocks.

The code connected to
an event block

runs when the approprite input,

like a click or a tap, is detected.

For example, if you attach this
`change size by` block

to the `when Alien 1 clicked` event
the sprite will change size when it's clicked.

Notice that event blocks don't snap
into your main program,

they create little programs of their own.

Remember that even if the event
only happens one time,

behaviors will go until you stop.

You can use a `stops` block

if you don't want multiple events
to combine behaviors.

Using events, you can create
imaginative programs

and interactive worlds.

Give it a try!