pxt-calliope/docs/reference/js/lessons/die-roll/activity.md

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2016-03-26 00:47:20 +01:00
# die roll activity
Create a die on the BBC micro:bit
To create a new script, go to the [Create Code](/microbit/create-code) page and tap *New Project* under **KindScript**.
Let's create a condition for when the BBC micro:bit is shaken.
```
input.onGesture(Gesture.Shake, () => {
})
```
We need to show a random value from 1 to 6 on our die. So let's make a local variable called **roll**.
```
input.onGesture(Gesture.Shake, () => {
let roll = Math.random(6)
})
```
We need a condition for if **roll** is 5. We will show a `6` if **roll** is 5 because **roll** has a range from 0 to 5. We can use `Show LEDs` to display the side of a die that shows 6.
```
input.onGesture(Gesture.Shake, () => {
let roll1 = Math.random(6)
if (roll1 == 5) {
basic.showLeds(`
. # . # .
. . . . .
. # . # .
. . . . .
. # . # .
`, 400)
}
})
```
Let's use an `else if` condition for if **roll** is 4. If **roll** is 4 we can show 5 dots on the die.
```
input.onGesture(Gesture.Shake, () => {
let roll2 = Math.random(6)
if (roll2 == 5) {
basic.showLeds(`
. # . # .
. . . . .
. # . # .
. . . . .
. # . # .
`, 400)
} else if (roll2 == 4) {
basic.showLeds(`
. . . . .
. # . # .
. . # . .
. # . # .
. . . . .
`, 400)
}
})
```
Now we need to repeat the same steps for if **roll** is 3. If **roll** is 3 we will show `4` on the die. Let's also repeat these steps to show the 3, 2, and 1 on the die. We are almost done with our die!
```
input.onGesture(Gesture.Shake, () => {
let roll3 = Math.random(6)
if (roll3 == 5) {
basic.showLeds(`
. # . # .
. . . . .
. # . # .
. . . . .
. # . # .
`, 400)
} else if (roll3 == 4) {
basic.showLeds(`
. . . . .
. # . # .
. . # . .
. # . # .
. . . . .
`, 400)
}
else if (roll3 == 3) {
basic.showLeds(`
. . . . .
. # . # .
. . . . .
. # . # .
. . . . .
`, 400)
}
else if (roll3 == 2) {
basic.showLeds(`
# . . . .
. . . . .
. . # . .
. . . . .
. . . . #
`, 400)
}
else if (roll3 == 1) {
basic.showLeds(`
. . . . .
. # . . .
. . . . .
. . . # .
. . . . .
`, 400)
}
else {
basic.showLeds(`
. . . . .
. . . . .
. . # . .
. . . . .
. . . . .
`, 400)
}
})
```
### ~avatar avatar
Excellent, you're ready to continue with the [challenges](/microbit/lessons/die-roll/challenges)!
### ~