115 lines
2.5 KiB
Markdown
115 lines
2.5 KiB
Markdown
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# magic 8 activity
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a fortune teller game on the BBC micro:bit #docs
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### ~avatar avatar
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Welcome! This tutorial will help you create a magic 8 ball on the BBC micro:bit. Let's get started!
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### ~
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To create a new script, go to the [Create Code](/microbit/create-code) page and tap *New Project* under **Touch Develop**.
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Show a string to instruct the user how to play Magic 8! The magic 8 ball can only answer true or false questions.
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```
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basic.showString("Ask a question", 150)
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```
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Display the number 8.
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```
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basic.showString("Ask a question", 150)
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basic.showNumber(8, 150)
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```
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* Run your program
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Register code to run when the BBC micro:bit is shaken.
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```
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basic.showString("Ask a question", 150)
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basic.showNumber(8, 150)
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input.onGesture(Gesture.Shake, () => {
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})
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```
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Create a variable of type number called **x**.
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Set **x** equal to a random number with a limit of 3.
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Remember the random function in the math library, picks a random number from 0 to the limit, but not including the limit unless it is 0.
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```
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basic.showString("Ask a question", 150)
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basic.showNumber(8, 150)
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input.onGesture(Gesture.Shake, () => {
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let x = Math.random(3)
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})
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```
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Create an if statement for the condition `if x= 2`.
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If **x** is 2, display the string 'Yes'
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```
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basic.showString("Ask a question", 150)
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basic.showNumber(8, 150)
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input.onGesture(Gesture.Shake, () => {
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let x1 = Math.random(3)
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if (x1 == 2) {
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basic.showString("Yes", 150)
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}
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})
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```
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Create an if statement for the condition `if x = 1`.
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If ``x`` is 1, display the string 'No'
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```
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basic.showString("Ask a question", 150)
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basic.showNumber(8, 150)
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input.onGesture(Gesture.Shake, () => {
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let x2 = Math.random(3)
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if (x2 == 2) {
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basic.showString("Yes", 150)
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} else if (x2 == 1) {
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basic.showString("No", 150)
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}
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})
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```
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If **x** is not 2 or 1, it must be 0. This is the else condition.
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If **x** is 0, display the string 'I don't know'
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Display the number 8 so users know they can ask the magic 8 ball another question!
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```
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basic.showString("Ask a question", 150)
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basic.showNumber(8, 150)
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input.onGesture(Gesture.Shake, () => {
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basic.clearScreen()
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let randomNumber = Math.random(3)
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if (randomNumber == 2) {
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basic.showString("Yes", 150)
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} else if (randomNumber == 1) {
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basic.showString("No", 150)
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}
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else {
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basic.showString("I don't know", 150)
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}
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basic.showNumber(8, 150)
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})
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```
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* Run your program
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### ~avatar avatar
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Excellent, you're ready to continue with the [challenges](/microbit/lessons/magic-8/challenges)!
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### ~
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