tweaks to getting started
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Peli de Halleux
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@ -7,6 +7,8 @@ Are you ready to build cool BBC micro:bit programs?
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Here are some challenges for you. Unscramble the blocks in the editor
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to make real programs that work!
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[OPEN EDITOR](/#follow:getting-started)
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## ~
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### Happy face
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@ -188,47 +190,6 @@ input.onGesture(Gesture.Shake, () => {
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```
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Click **Compile** to move your program to the BBC micro:bit!
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### Tilting with gestures
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You can also find when someone is tilting the micro:bit left or right,
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face up or face down, and logo up or logo down (the logo is the yellow
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oval picture at the top of the board). Tilting a micro:bit like this
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is called a **gesture**.
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Try to build a Rock Paper Scissors game where you tilt the micro:bit
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left to show paper, right to show scissors, and down to show rock.
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Unscramble these blocks in the editor and try this program on a real
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micro:bit!
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```shuffle
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input.onGesture(Gesture.TiltLeft, () => {
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basic.showLeds(`
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# # # # #
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# . . . #
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# . . . #
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# . . . #
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# # # # #`);
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});
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input.onGesture(Gesture.LogoDown, () => {
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basic.showLeds(`
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. . . . .
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. # # # .
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. # # # .
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. # # # .
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. . . . .`);
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});
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input.onGesture(Gesture.TiltRight, () => {
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basic.showLeds(`
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# # . . #
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# # . # .
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. . # . .
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# # . # .
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# # . . #`);
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});
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```
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Click **Compile** to move your program to the BBC micro:bit!
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### Pins
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You can also use the pins as buttons. (The pins are the holes in the
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@ -236,91 +197,47 @@ metal stripe at the bottom of the micro:bit board.) For example, hold
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the ``GND`` button with one hand and touch the ``0`` pin (called
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``P0``) with your other hand to tell the micro:bit you're pressing it.
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Unscramble the blocks in the editor to show a smiley when you press
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Unscramble the blocks in the editor to show a heart when you press
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pin ``P0``.
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```shuffle
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input.onPinPressed(TouchPin.P0, () => {
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basic.showLeds(`
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. . . . .
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. # . # .
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. . . . .
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# . # . #
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# . . . #
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. # # # .`);
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. # . # .
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. . # . .`);
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});
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```
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Click **Compile** to move your program to the BBC micro:bit!
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### Your turn!
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## ~hint
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Use the screen, buttons, gestures, and pins to make your own fun game
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with the BBC micro:bit! What about some of these?
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Try this experiment: find a friend and hold hands together. Press the ``GND`` button
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while your friend pressed the ``P0`` button. You should see the heart! The electric current is going through your bodies and accross your handshake
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to make it happen!
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* A backpack burglar alarm
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* Daily news broadcaster for your class
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* Animated jewelry
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* A _complete_ animated cartoon
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* A calculator
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* A music box
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These are all things you can make with the BBC micro:bit by itself.
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Just think what you can do if you connect the micro:bit's pins to
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extra parts like microphones and other **sensors**!
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## ~
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## Let's play Rock Paper Scissors!
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### ~avatar avatar
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```sim
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input.onGesture(Gesture.Shake, () => {
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let img = Math.random(3)
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if (img == 0) {
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basic.showLeds(`
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# # # # #
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# . . . #
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# . . . #
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# . . . #
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# # # # #
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`)
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} else if (img == 1) {
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basic.showLeds(`
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. . . . .
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. # # # .
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. # # # .
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. # # # .
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. . . . .
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`)
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} else {
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basic.showLeds(`
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# # . . #
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# # . # .
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. . # . .
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# # . # .
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# # . . #
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`)
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}
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})
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```
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Build a Rock Paper Scissors game with the BBC micro:bit!
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You can play the game with a friend who has it on a micro:bit.
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You can also play it with friends who are just using their hands.
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## [START PROJECT](/#follow:/projects/rock-paper-scissors)
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### ~
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## Materials needed
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* Your BBC micro:bit -- that's it!
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## Step 1: Getting started
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We want the micro:bit to choose rock, paper, or scissors when you
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shake it. Try creating an ``on shake`` block so when you shake the
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micro:bit, it will run part of a program.
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Clear up the blocks and add the blocks below.
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```blocks
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input.onGesture(Gesture.Shake, () => {
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@ -328,8 +245,7 @@ input.onGesture(Gesture.Shake, () => {
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```
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Next, when you shake the micro:bit, it should pick a random number from `0` to `2`
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and store it in the variable `weapon`. (This variable is named `weapon` because
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rock, paper, and scissors are the weapons you use to battle your friends!)
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and store it in the variable `item`.
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Add a ``set`` block with a variable. Then add a ``pick random`` block,
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and store the random number in the variable,
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@ -337,7 +253,7 @@ like this:
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```blocks
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input.onGesture(Gesture.Shake, () => {
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let weapon = Math.random(3)
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let item = Math.random(3)
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})
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```
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@ -353,7 +269,7 @@ We will show the right picture for that number on the LED screen.
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## Step 2: Picking paper
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Put an ``if`` block after the ``let`` block that checks whether
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`weapon` is `0`. Make sure the ``if`` block has an ``else if`` part
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`item` is `0`. Make sure the ``if`` block has an ``else if`` part
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and an ``else`` part.
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Next, add a ``show leds`` block that shows a
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@ -361,8 +277,8 @@ picture of a piece of paper:
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```blocks
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input.onGesture(Gesture.Shake, () => {
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let weapon = Math.random(3)
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if (weapon == 0) {
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let item = Math.random(3)
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if (item == 0) {
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basic.showLeds(`
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# # # # #
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# . . . #
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@ -383,13 +299,13 @@ input.onGesture(Gesture.Shake, () => {
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Now we are going to add a new picture for the micro:bit to show
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when another random number comes up.
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Make the ``else if`` part check if the variable `weapon` is `1`.
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Make the ``else if`` part check if the variable `item` is `1`.
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Then add a ``show leds`` block with a picture of a rock.
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```blocks
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input.onGesture(Gesture.Shake, () => {
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let weapon = Math.random(3)
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if (weapon == 0) {
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let item = Math.random(3)
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if (item == 0) {
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basic.showLeds(`
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# # # # #
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# . . . #
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@ -397,8 +313,7 @@ input.onGesture(Gesture.Shake, () => {
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# . . . #
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# # # # #
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`)
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} else if (weapon == 1) {
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} else if (item == 1) {
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basic.showLeds(`
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. . . . .
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. # # # .
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@ -418,8 +333,8 @@ Add a ``show leds`` block with a picture of scissors to the ``else`` part:
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```blocks
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input.onGesture(Gesture.Shake, () => {
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let weapon = Math.random(3)
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if (weapon == 0) {
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let item = Math.random(3)
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if (item == 0) {
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basic.showLeds(`
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# # # # #
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# . . . #
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@ -428,7 +343,7 @@ input.onGesture(Gesture.Shake, () => {
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# # # # #
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`)
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} else if (weapon == 1) {
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} else if (item == 1) {
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basic.showLeds(`
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. . . . .
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. # # # .
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@ -451,7 +366,7 @@ input.onGesture(Gesture.Shake, () => {
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### ~hint
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You don't need to check if `weapon` is `2` because `2` is the only number left out of `0`, `1`, and `2`.
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You don't need to check if `item` is `2` because `2` is the only number left out of `0`, `1`, and `2`.
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That's why you can use an ``else`` instead of an ``else if``.
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### ~
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