pxt-calliope/docs/lessons/magic-8.md

# magic 8 lesson

a fortune teller game with the BBC micro:bit #string #shake #clear-screen #if #string #number #var #docs

## Topic

If (Conditionals)

## Quick Links

* [activity](/microbit/lessons/magic-8/activity)
* [challenges](/microbit/lessons/magic-8/challenges)

## Prior learning/place of lesson in scheme of work

Learn how to creating **conditionals**, `if condition do` to conditionally run code depending on whether a condition is true or not. We will be learning how to create a fortune telling app using local variable and conditionals (If), input on shake as well as simple commands, such as show string, show number, and clear screen.

## Documentation

```docs
if (true) {

}
Math.random(3)
input.onGesture(Gesture.Shake, () => {

})
basic.showNumber(7)
basic.clearScreen()
basic.showString("Hello!")

```

## Objectives

* learn how to show a string on the LED screen
* learn how to show a number on the LED screen
* learn how to learn how to turn off all the LED lights on the LED screen
* learn how to use the input on shake
* learn how to learn how to create a local variable to store data so that you can use it later in your code
* learn how to learn how to return a random number
* learn how to learn how to conditionally run code depending on whether a condition is true or not