pxt-calliope/docs/lessons/die-roll/activity.md
2016-03-25 16:47:20 -07:00

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# die roll activity
Create a die on the micro:bit
### ~avatar avatar
### @video td/videos/die-roll-0
Welcome! This tutorial will help you create a die. Let's get started!
### ~
Let's create a condition for when the micro:bit is shaken.
```blocks
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**.
```blocks
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.
```blocks
input.onGesture(Gesture.Shake, () => {
let roll = Math.random(6);
if (roll == 5) {
basic.showLeds(`
. # . # .
. . . . .
. # . # .
. . . . .
. # . # .`);
}
});
```
Let's use an `else if` condition for if **roll** is 4. If **roll** is 4 we can show 5 dots on the die.
```blocks
input.onGesture(Gesture.Shake, ()=> {
let roll = Math.random(6);
if (roll == 5) {
basic.showLeds(`
. # . # .
. . . . .
. # . # .
. . . . .
. # . # .`);
}
else if (roll == 4) {
basic.showLeds(`
. . . . .
. # . # .
. . # . .
. # . # .
. . . . .`);
}
});
```
Now we need to repeat the same steps for if **roll** is 3. If **roll** is 3 we will show `4` on the die.
```blocks
input.onGesture(Gesture.Shake, () => {
let roll = Math.random(6);
if (roll == 5) {
basic.showLeds(`
. # . # .
. . . . .
. # . # .
. . . . .
. # . # .`);
}
else if (roll == 4) {
basic.showLeds(`
. . . . .
. # . # .
. . # . .
. # . # .
. . . . .`);
}
else if (roll == 3) {
basic.showLeds(`
. . . . .
. # . # .
. . . . .
. # . # .
. . . . .`);
}
});
```
Let's also repeat these steps to show the 3, 2, and 1 on the die. We are almost done with our die!
```blocks
input.onGesture(Gesture.Shake, () => {
let roll = Math.random(6);
if (roll == 5) {
basic.showLeds(`
. # . # .
. . . . .
. # . # .
. . . . .
. # . # .`);
}
else if (roll == 4) {
basic.showLeds(`
. . . . .
. # . # .
. . # . .
. # . # .
. . . . .`);
}
else if (roll == 3) {
basic.showLeds(`
. . . . .
. # . # .
. . . . .
. # . # .
. . . . .`);
}
else if (roll == 2) {
basic.showLeds(`
# . . . .
. . . . .
. . # . .
. . . . .
. . . . #`);
}
else if (roll == 1) {
basic.showLeds(`
. . . . .
. # . . .
. . . . .
. . . # .
. . . . .`);
}
else {
basic.showLeds(`
. . . . .
. . . . .
. . # . .
. . . . .
. . . . .`);
}
});
```
### ~avatar avatar
Excellent, you're ready to continue with the [challenges](/microbit/lessons/die-roll/challenges)!
### ~