pxt-calliope/docs/reference/js/lessons/magic-logo/activity.md

42 lines
1.0 KiB
Markdown
Raw Normal View History

2016-03-26 00:47:20 +01:00
# magic logo activity
show an image that points up when the logo is up. #docs #microbit
### ~avatar avatar
### @video td/videos/magic-logo-0
Welcome! This tutorial will help you display an arrow pointing toward the logo! Let's get started.
### ~
Using the **accelerometer** sensor, the BBC micro:bit can detect when the **logo** is oriented **up**. We call that the **logo up** event. We will use `input->on logo up` to register an event handler that will run when the **logo up** event happens.
```
input.onLogoUp(() => {
}) // ***
```
When the BBC micro:bit goes logo up, the code nested under the `basic->on logo up` function will run. Let's add a line of code to plot an image in there.
```
input.onLogoUp(() => {
basic.showLeds(`
. . # . .
. # # # .
# # # # #
. . # . .
. . # . .
`, 400) // ***
})
```
Run your code and try to turn around the BBC micro:bit to see the **logo up** event in action!
### ~avatar boothing
Excellent, you're ready to continue with the [challenges](/microbit/lessons/magic-logo/challenges)!
### ~