pxt-calliope/docs/reference/js/lessons/prank-wifi/challenges.md

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2016-03-26 00:47:20 +01:00
# prank wifi challenges
create a fake wifi app to trick your friends. #docs
## Before we get started
Complete the following guided tutorial:
* [tutorial](/microbit/lessons/prank-wifi/tutorial)
At the end of the tutorial, click `keep editing`. Your code should look like this:
```
basic.showString("Check Wifi", 150)
basic.forever(() => {
let xAccel = math.abs(input.acceleration("x"))
let yAccel = math.abs(input.acceleration("y"))
let zAccel = math.abs(input.acceleration("z"))
let sum = xAccel + yAccel + zAccel
if (sum < 1400) {
basic.plotImage(`
. . . . .
. . . . .
. . # . .
. # # . .
# # # . .
`)
} else if (sum >= 1400 && sum < 1680) {
basic.plotImage(`
. . . . .
. . . # .
. . # # .
. # # # .
# # # # .
`)
}
else if (sum >= 1680) {
basic.plotImage(`
. . . . .
. . . . .
. . . . .
. . . . .
# . . . .
`)
}
})
```
**Challenge 1**
What if wanted to show the maximum connectivity of wifi instead of just 1, 3, or 4 bars?
Let's start by changing the first **IF** statement to `if sum <1200`.
Edit this line: **if** sum <1400 **then**
Just click on the `1400` and backspace until you can add your own number of `1200`.
```
basic.showString("Check Wifi", 150)
basic.forever(() => {
let xAccel1 = math.abs(input.acceleration("x"))
let yAccel1 = math.abs(input.acceleration("y"))
let zAccel1 = math.abs(input.acceleration("z"))
let sum1 = xAccel1 + yAccel1 + zAccel1
if (sum1 < 1200) {
basic.plotImage(`
. . . . .
. . . . .
. . # . .
. # # . .
# # # . .
`)
} else if (sum1 >= 1400 && sum1 < 1680) {
basic.plotImage(`
. . . . .
. . . # .
. . # # .
. # # # .
# # # # .
`)
}
else if (sum1 >= 1680) {
basic.plotImage(`
. . . . .
. . . . .
. . . . .
. . . . .
# . . . .
`)
}
})
```
**Challenge 2**
Let's add an **IF** at the bottom of your code that checks to see if `sum >= to 1200` **and** if `sum <1400`
```
basic.showString("Check Wifi", 150)
basic.forever(() => {
let xAccel2 = math.abs(input.acceleration("x"))
let yAccel2 = math.abs(input.acceleration("y"))
let zAccel2 = math.abs(input.acceleration("z"))
let sum2 = xAccel2 + yAccel2 + zAccel2
if (sum2 < 1200) {
basic.plotImage(`
. . . . .
. . . . .
. . # . .
. # # . .
# # # . .
`)
} else if (sum2 >= 1400 && sum2 < 1680) {
basic.plotImage(`
. . . . .
. . . # .
. . # # .
. # # # .
# # # # .
`)
}
else if (sum2 >= 1680) {
basic.plotImage(`
. . . . .
. . . . .
. . . . .
. . . . .
# . . . .
`)
}
if (sum2 >= 1200 && sum2 < 1400) {
basic.plotImage(`
. . . . #
. . . # #
. . # # #
. # # # #
# # # # #
`) // ***
}
})
```
**Challenge 3**
Now it's your turn! Be creative and change the Wifi meter images to your own wifi image you're sure will prank your friends by editing the lines that call `plot image()`.