---
id: 661eea69ca8a5177320d5e90
title: Task 101
challengeType: 22
dashedName: task-101
---

<!-- (Audio) Sophie: How does it work exactly? Tom: AR apps use your device's camera to add digital content to the physical world. It's so cool. For example, in gaming, you can chase virtual creatures in your neighborhood. -->

# --description--

Let's review what Sophie and Tom talk about, to understand how AR works.

# --fillInTheBlank--

## --sentence--

`Sophie: How does it work, exactly?`

`Tom: AR apps use your BLANK's camera to BLANK digital content to the physical world. It's so cool. For example, in gaming, you can BLANK virtual creatures in your BLANK.`

## --blanks--

`device`

### --feedback--

Your computer, cell phone, or other machine.

---

`add`

### --feedback--

To insert or to include.

---

`chase`

### --feedback--

To run after something, to pursue it.

---

`neighborhood`

### --feedback--

The area around and close to where your home is.

# --scene--

```json
{
  "setup": {
    "background": "company2-parking.png",
    "characters": [
      {
        "character": "Sophie",
        "position": {
          "x": 50,
          "y": 0,
          "z": 1.4
        },
        "opacity": 0
      },
      {
        "character": "Tom",
        "position": {
          "x": 50,
          "y": 15,
          "z": 1.2
        },
        "opacity": 0
      }
    ],
    "audio": {
      "filename": "4.2-5.mp3",
      "startTime": 1,
      "startTimestamp": 12.46,
      "finishTimestamp": 24.4
    }
  },
  "commands": [
    {
      "character": "Sophie",
      "opacity": 1,
      "startTime": 0
    },
    {
      "character": "Sophie",
      "startTime": 1,
      "finishTime": 2.16,
      "dialogue": {
        "text": "How does it work exactly?",
        "align": "center"
      }
    },
    {
      "character": "Sophie",
      "opacity": 0,
      "startTime": 2.52
    },
    {
      "character": "Tom",
      "opacity": 1,
      "startTime": 2.52
    },
    {
      "character": "Tom",
      "startTime": 2.88,
      "finishTime": 8.74,
      "dialogue": {
        "text": "AR apps use your device's camera to add digital content to the physical world. It's so cool.",
        "align": "center"
      }
    },
    {
      "character": "Tom",
      "startTime": 9.08,
      "finishTime": 12.94,
      "dialogue": {
        "text": "For example, in gaming, you can chase virtual creatures in your neighborhood.",
        "align": "center"
      }
    },
    {
      "character": "Tom",
      "opacity": 0,
      "startTime": 13.44
    }
  ]
}
```
