Congratulations on building your DJ mixer.
Today you're gonna use some of the core computer science
concepts you already know by using forever loops
to repeat and action and using an event to capture a
keyboard press from the person using your computer program.
You also learned a really important
computer science concept, variables.
Use the variable to distort the position of the sliders
so that you can use your value in your code.
The code bot knows to look inside that variable for how
long the computer should wait before performing an action.
So if the variable changes the wait length changes also.
Variables are also used in nearly every computer program.
Computer scientists use to store the cost of an item
in an app so that people can buy
and sell clothing with one another.
A variable stores the scores in a racing game app
and stores the price of homes in a real estate app.
Although variables exist in computer science,
they can also apply to any field that interests you.
From gaming to retail, and even real estate.
You can use computer science to build all kinds of apps
and tools for the people to use.
When you take a computer science class in the future
you'll learn even more cool and fun ways to use variables.
When you get there you'll be ahead of the game because
you already made and used variables in Scratch.
The next time we meet in CS First you'll build your own
music video with songs, characters, and special effects.
