pxt-calliope/docs/reference/js/lessons/on-fall/challenges.md

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2016-03-26 00:47:20 +01:00
# landslide challenges
The on fall function. #onfall #docs
### Challenge 0
Welcome! This [guided tutorial](https://live.microbit.co.uk/td/lessons/on-fall/tutorial) will show you how to detect when the micro:bit is falling. Your goal is to write a program that detects when the micro:bit falls!
```
input.onFall(() => {
images.createImage(`
. . # . .
. . # . .
. . # . .
. . . . .
. . # . .
`).showImage(0) // ***
})
```
### Challenge 1
Add a pause within `input->on fall`. This will allow us to display another image in the next challenge.
```
input.onFall(() => {
images.createImage(`
. . # . .
. . # . .
. . # . .
. . . . .
. . # . .
`).showImage(0)
basic.pause(2000) // ***
})
```
### Challenge 2
Create and display an `X` after the pause from Challenge 1
```
input.onFall(() => {
images.createImage(`
. . # . .
. . # . .
. . # . .
. . . . .
. . # . .
`).showImage(0)
basic.pause(2000)
images.createImage(`
# . . . #
. # . # .
. . # . .
. # . # .
# . . . #
`).showImage(0) // ***
})
```
### Challenge 3
Create a loop so that the micro:bit alternates between the exclamation point and "X" images when the micro:bit falls. You will need a `forever` loop and a pause at the end of the loop to do this.
## See Also
[on shake](/microbit/reference/input/on-gesture)