pxt-calliope/docs/lessons/bop-it/activity.md

# bop it challenges

a game similar to "Simon Says" with the BBC micro:bit.

## Before we get started

Complete the following guided tutorial. Your code should look like this:

```blocks
newAction() // ***
input.onButtonPressed(Button.A, () => {
    if (action == 0) {
        game.addScore(1) // ***
        newAction() // ***
    }
}) // ***
input.onLogoDown(() => {
    if (action == 1) {
        game.addScore(1) // ***
        newAction() 
    }
}) 
input.onGesture(Gesture.Shake, () => {
    if (action == 2) {
        game.addScore(1)
        newAction()
    }
}) 
input.onButtonPressed(Button.B, () => {
    basic.showNumber(game.score(), 150) // ***
    basic.pause(2000) // ***
    newAction() // ***
}) 
```

### Challenge 1

Now let's add some more types of instructions for the player to follow. Let's add `PRESS PIN 0`. Change the global variable `action` to `math->random(4)` so that we can add a new **IF** statement that checks if `action=3`. If it does, display instructions to press pin 0.

```blocks
/**
 * {highlight}
 */
export function newAction() {
    action = Math.random(4) // ***
    if (action == 0) {
        basic.showString("PUSH A", 150) // ***
    }
    if (action == 1) {
        basic.showString("LOGO DOWN", 150) // ***
    }
    if (action == 2) {
        basic.showString("SHAKE", 150) // ***
    }
    if (action == 3) {
        basic.showString("PRESS PIN 0", 150) // ***
    }
}
```

### Challenge 2

Now let's implement `PRESS PIN 0` in the main. Create a condition of `input->on pin pressed("P0")` that will add one to the score and calls the method `new action`.

```
// **. . .**
input.onButtonPressed(Button.B, () => {
    basic.showNumber(game.score(), 150) // ***
    basic.pause(2000) // ***
    newAction() // ***
}) // ***
input.onPinPressed(TouchPin.P0, () => {
    if (action == 3) {
        game.addScore(1) // ***
        newAction() // ***
    }
}) // ***
```

### Challenge 3

Add `POINT ME NORTH` to the list of possible commands.