This add on will create a sprite
that will perform different actions
in response to its surroundings.
To start click on, choose new sprite from library,
and add a new sprite.
This project we'll use the beach ball
for the summer sale blowout,
but you can pick any sprite you'd like.
Make your sprite smaller to fit on your stage.
Next, make the beach ball bounce randomly around the screen.
To do that use a glide block from
the Motion menu to make the sprite move.
Then place pick random blocks in the x
and y values of the glide block to make
the sprite go random places on the screen.
The values in the pick random blocks create
a range of coordinates for the sprite to move to.
The computer will choose a random value
between these two numbers and the sprite will move
to that spot on the screen.
The width of the stage is negative 240 to positive 240
so add those values into the pick random block for x.
The height of the stage is negative 180 to positive 180
so add those values into the pick random block for y.
You can also add a pick random block
for the seconds it takes to glide
to different points on the screen,
so the sprite moves for a random amount of time.
Do what looks best in your project.
Try your code by clicking on the block stack.
To make this continuously happen,
place a forever loop around the glide block
and add a when flag clicked block
on top of this block stack.
Test it out.
Cool, you can also make the beach ball
do different actions when it touches
other things on the stage.
This example we'll code for if
the beach ball touches the hippo
and if the beach ball touches
the sides of the window display.
Drag out two if then statements from the Control menu.
Add two touching blocks from the Sensing menu
into the if then statements.
In this example, one is touching hippo,
and the other is touching window display.
You can make the sprite do whatever you want
when it touches another sprite or the window display.
For this example when the beach ball touches
the hippo it will turn right 60 degrees.
When the beach ball touches the window display sprite,
it will turn left and change its color effect.
Add these blocks inside the first if then statement.
Add a when flag clicked event at the top
of this block stack to test your program.
Nothing happens.
The sprite should check the conditional statements
continuously so place a forever loop
around both if then statements.
Now test the code.
Awesome, when the beach ball touches the hippo
it spins and when it touches the store front
the beach ball turns and changes color.
Now when shoppers walk by they can see
the beach ball in action.
Now it's your turn.
Add a new sprite,
code it to move randomly across the screen using glide,
pick random and forever blocks.
Add conditionals to your sprite
so that it will do an effect when
it touches the window display,
another sprite or the mouse pointer.
You can add any blocks you like
inside your if then statements.
Don't forget to add when flag clicked events
to run your code when the flag is clicked.
If you have a question ask your neighbor or,
put up your sticky note to get
the attention of your CS First guru.
