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In this video, you'll program
the ghost, pixelate, mosaic, and fisheye sprites
to broadcast messages.
Then, you'll program the nature sprite
to change its appearance when it receives each
of those messages.
The process for programming the rest
of the button sprites is similar
to the process you just followed to program
the color and reset buttons.
First, select the ghost sprite.
Add a broadcast block.
Click the dropdown menu, select new message,
and name the message something like ghost.
Add a when this sprite is clicked block.
Next, select the nature sprite.
Add a when I receive block, and select the ghost message
you just created from the dropdown menu.
Add a change effect block from the looks menu.
Click the dropdown menu to select the ghost effect.
Tinker with the value in the block
until you get an effect you like.
Whoa, that's super light.
Click the reset button to return the image
to its original look.
Repeat this process for the other button sprites.
For the pixelate button, add a broadcast block.
Name the message pixelate.
Add a when this sprite clicked event
to the top of the code stack.
Select the nature sprite, add a when I receive block,
and select the pixelate message.
Add a change effect by block from the looks menu.
Click the dropdown menu to select the pixelate effect.
When you click the pixelate button, it broadcasts a message.
When this message is received by the nature sprite,
the pixelation effect is applied to the image.
That's pretty cool.
Repeat this process for the mosaic and fisheye buttons.
Each button will broadcast a message, and the image sprite
will receive the appropriate message to change its look.
If you have a question while you are working,
ask a neighbor for help.
Now, all the button sprites broadcast messages
to the image sprite when they're clicked.
The image sprite changes how it looks based
on the message it receives.
In the next video, you'll find out how to change
the image displayed in the program.
Now it's your turn.
Program the ghost, pixelate, mosaic, and fisheye sprites
to broadcast messages when clicked.
Program the nature sprite to change ghost effect,
pixelate, mosaic effect, and the fisheye effect
when it receives those messages.
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