pxt-microbit
Version:
micro:bit target for Microsoft MakeCode (PXT)
104 lines (75 loc) • 2.44 kB
Markdown
# 7 seconds game
## {Introduction @unplugged}
The goal of this game is press a button after **exactly** 7 seconds!
This game is inspired from the [flipping panckakes game](https://www.elecfreaks.com/blog/post/flipping-pancakes-microbit-game.html).
## {Step 1}
The player starts the timer by pressing button **A**. We'll run the code run code when ``||input:button A is pressed||``.
```blocks
input.onButtonPressed(Button.A, function () {
})
```
## {Step 2}
We need to remember the time when the button was pressed so that we can compute the elapsed time later on.
Add code to store the ``||input:running time||`` in a ``||variables:start||`` variable.
```blocks
let start = 0
input.onButtonPressed(Button.A, function () {
// @highlight
start = input.runningTime()
})
```
## {Step 3}
Show something on the screen so that the user knows that the timer has started...
```blocks
let start = 0
input.onButtonPressed(Button.A, function () {
start = input.runningTime()
// @highlight
basic.showIcon(IconNames.Chessboard)
})
```
## {Step 4}
The player stops the timer by pressing button **B**. Add the code to run code when ``||input:button B is pressed||``.
```blocks
input.onButtonPressed(Button.B, function () {
})
```
## {Step 5}
Compute the elapsed time as ``||input:running time||`` ``||math:minus||`` ``||variables:start||`` and store it into a new variable ``||variables:elapsed||``.
```blocks
let start = 0
let elapsed = 0
input.onButtonPressed(Button.B, function () {
// @highlight
elapsed = input.runningTime() - start
})
```
## {Step 6}
Compute the ``||variables:score||`` of the game as the ``||math:absolute value||`` of the ``||math:difference||`` of ``||variables:elapsed||`` time from 7 seconds, which is 7000 milliseconds.
```blocks
let start = 0
let elapsed = 0
let score = 0
input.onButtonPressed(Button.B, function () {
elapsed = input.runningTime() - start
// @highlight
score = Math.abs(elapsed - 7000)
})
```
## {Step 7}
Display the score on the screen and your game is ready!
```blocks
let start = 0
let elapsed = 0
let score = 0
input.onButtonPressed(Button.B, function () {
elapsed = input.runningTime() - start
score = Math.abs(elapsed - 7000)
// @highlight
basic.showNumber(score)
})
```
```template
input.onButtonPressed(Button.A, function () {})
```