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

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.

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 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.

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.

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!

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!

~