# Heads Guess!

### @explicitHints true

## Make a Heads Up guessing game! @unplugged

This is a simple remake of the famous **Heads Up!** game. The player holds the @boardname@ on the forehead and has 30 seconds to guess words displayed on the screen.
If the guess is correct, the player tilts the @boardname@ forward; to pass, the player tilts it backwards.

## {Step 1}

Put in code to ``||game:start a countdown||`` of 30 seconds.

```spy
game.startCountdown(30000)
```

## {Step 2}

Create an ``||arrays:array||`` called `text_list` of words to guess. Arrays are also called lists.

```spy
let text_list: string[] = []
text_list = ["PUPPY", "CLOCK", "NIGHT"]
game.startCountdown(30000)
```

## {Step 3}

Add an event to run code when a ``||input:gesture||`` points the @boardname@ ``||input:logo up||``.
This is the gesture to get a new word.

```spy
input.onGesture(Gesture.LogoUp, function () {

})
```

## {Step 4}

The items in the ``||arrays:text list||`` are numbered ``0`` to ``length - 1``.
Add code to pick a ``||math:random||`` ``||variables:index||``.

```spy
let text_list: string[] = []
let index = 0
input.onGesture(Gesture.LogoUp, function () {
    // @highlight
    index = randint(0, text_list.length - 1)
})
```

## {Step 5}

Add code to ``||basic:show||`` the value of the item stored at ``||variables:index||`` in
``||arrays:text list||``.

```spy
let text_list: string[] = []
let index = 0
input.onGesture(Gesture.LogoUp, function () {
    index = randint(0, text_list.length - 1)
    // @highlight
    basic.showString(text_list[index])
})
```

## {Step 6}

Use an event to run code when a gesture has the  @boardname@ ``||input:screen||`` is
pointing ``||input:down||``. This is the gesture for a correct guess.

```spy
input.onGesture(Gesture.ScreenDown, function () {

})
```

## {Step 7}

Put in code to add points to the ``||game:score||``.

```spy
input.onGesture(Gesture.ScreenDown, function () {
    // @highlight
    game.addScore(1)
})
```

## {Step 8}

Add another event to run code when a gesture has the @boardname@ ``||input:screen||`` is
pointing ``||input:up||``. This is the gesture for a pass.

```spy
input.onGesture(Gesture.ScreenUp, function () {

})
```

## {Step 9}

For the pass gesture, add code to remove a ``||game:life||`` from the player.

```spy
input.onGesture(Gesture.ScreenUp, function () {
    // @highlight
    game.removeLife(1)
})
```