pxt-calliope/docs/reference/js/lessons/rock-paper-scissors/quiz.md

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2016-03-26 00:47:20 +01:00
# rock paper scissors quiz
shift an image horizontally across the display with offset #offset #screen #variables #docs
## Name
## Directions
Use this activity document to guide your work in the [rock paper scissors tutorial](/microbit/lessons/rock-paper-scissors/tutorial).
Answer the questions while completing the tutorial. Pay attention to the dialogues!
## 1. Describe what `offset` does?
<br/>
## 2. Draw which LEDs are ON after running this code and the random number returned is 0
```
let img = images.createImage(`
. . . . . # # # # # . . . . #
. # # # . # . . . # # # . # .
. # # # . # . . . # . # # . .
. # # # . # . . . # # # . # .
. . . . . # # # # # . . . . #
`)
let offset = Math.random(3) * 5
img.showImage(offset)
```
![](/static/mb/lessons/night-light-2.png)
<br/>
<br/>
## 3. Draw which LEDs are ON after running this code with an offset of 5. This would occur if the random number returned is 1.
```
let img_ = images.createImage(`
. . . . . # # # # # . . . . #
. # # # . # . . . # # # . # .
. # # # . # . . . # . # # . .
. # # # . # . . . # # # . # .
. . . . . # # # # # . . . . #
`)
let offset_ = Math.random(3) * 5
img.showImage(offset)
```
![](/static/mb/lessons/night-light-2.png)
<br/>
<br/>
## 4. Draw which LEDs are ON after running this code with an offset of 10. This would occur if the random number returned is 2.
```
let img_1 = images.createImage(`
. . . . . # # # # # . . . . #
. # # # . # . . . # # # . # .
. # # # . # . . . # . # # . .
. # # # . # . . . # # # . # .
. . . . . # # # # # . . . . #
`)
let offset_1 = Math.random(3) * 5
img.showImage(offset)
```
![](/static/mb/lessons/night-light-2.png)
<br/>