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Numerous requested changes. Still missing heads/tails.

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Ron Hale-Evans 2016-06-03 15:15:24 -07:00
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docs/getting-started.md
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@ -1,10 +1,14 @@
# Getting started
## ~avatar
Are you ready to build cool BBC micro:bit programs?
Here are some challenges for you. Unscramble the blocks in the editor
to make real programs that work!
## ~
### Happy face
There are three blocks in the editor (the area to the left).
@ -33,11 +37,7 @@ When you run this program, you will see a smiley face, then a blank
screen, then a smiley again -- it never stops! (That's because of the
``forever`` block.)
To move your program from your computer to the BBC micro:bit:
* Connect your micro:bit to the computer with the USB cable.
* Click **Compile**.
* Drag and drop the new file whose name ends in **.hex** into the **MICROBIT** window.
* Wait until the yellow light stops blinking!
Now move your program from your computer to the BBC micro:bit!
### Happy unhappy face
@ -66,11 +66,7 @@ basic.forever(() => {
});
```
To move your program from your computer to the BBC micro:bit:
* Connect your micro:bit to the computer with the USB cable.
* Click **Compile**.
* Drag and drop the new file whose name ends in **.hex** into the **MICROBIT** window.
* Wait until the yellow light stops blinking!
Now move your program from your computer to the BBC micro:bit!
### Your turn!
@ -124,11 +120,7 @@ basic.forever(() => {
});
```
To move your program from your computer to the BBC micro:bit:
* Connect your micro:bit to the computer with the USB cable.
* Click **Compile**.
* Drag and drop the new file whose name ends in **.hex** into the **MICROBIT** window.
* Wait until the yellow light stops blinking!
Now move your program from your computer to the BBC micro:bit!
#### ~hint
@ -138,12 +130,12 @@ You can find the ``show leds`` block in the **Basic** part of the editor.
### Button A and button B
This program will show the word **anteater** on the LED
This program will show the word **ANTEATER** on the LED
screen when you press button `A`.
```blocks
input.onButtonPressed(Button.A, () => {
basic.showString("anteater");
basic.showString("ANTEATER");
});
```
@ -155,11 +147,11 @@ on the micro:bit screen.
#### ~
Now try to unscramble these blocks in the editor so that the micro:bit
shows **banana** when you press button `B`.
shows **BANANA** when you press button `B`.
```shuffle
input.onButtonPressed(Button.B, () => {
basic.showString("banana");
basic.showString("BANANA");
});
```
#### ~hint
@ -172,8 +164,8 @@ You can find the letter `B` by clicking the letter `A` on the
#### Your turn!
Can you combine these blocks so your program shows your real name
instead of **anteater** when you press `A`, but _your secret agent
name_ instead of **banana** when you press `B`?
instead of **ANTEATER** when you press `A`, but _your secret agent
name_ instead of **BANANA** when you press `B`?
### Shake
@ -271,3 +263,242 @@ with the BBC micro:bit! What about some of these?
These are all things you can make with the BBC micro:bit by itself.
Just think what you can do if you connect the micro:bit's pins to
extra parts like microphones and other **sensors**!
## Let's play Rock Paper Scissors!
### ~avatar avatar
```sim
input.onGesture(Gesture.Shake, () => {
let img = Math.random(3)
if (img == 0) {
basic.showLeds(`
# # # # #
# . . . #
# . . . #
# . . . #
# # # # #
`)
} else if (img == 1) {
basic.showLeds(`
. . . . .
. # # # .
. # # # .
. # # # .
. . . . .
`)
} else {
basic.showLeds(`
# # . . #
# # . # .
. . # . .
# # . # .
# # . . #
`)
}
})
```
Build a Rock Paper Scissors game with the BBC micro:bit!
You can play the game with a friend who has it on a micro:bit.
You can also play it with friends who are just using their hands.
## [START PROJECT](/#follow:/projects/rock-paper-scissors)
### ~
## Materials needed
* Your BBC micro:bit -- that's it!
## Step 1: Getting started
We want the micro:bit to choose rock, paper, or scissors when you
shake it. Try creating an ``on shake`` block so when you shake the
micro:bit, it will run part of a program.
```blocks
input.onGesture(Gesture.Shake, () => {
})
```
Next, when you shake the micro:bit, it should pick a random number from `0` to `2`
and store it in the variable `weapon`. (This variable is named `weapon` because
rock, paper, and scissors are the weapons you use to battle your friends!)
Add a ``set`` block with a variable. Then add a ``pick random`` block,
and store the random number in the variable,
like this:
```blocks
input.onGesture(Gesture.Shake, () => {
let weapon = Math.random(3)
})
```
### ~hint
No one can predict random numbers. That's what makes them great for Rock Paper Scissors!
### ~
Each possible number these blocks can make (`0`, `1`, or `2`) means a different picture.
We will show the right picture for that number on the LED screen.
## Step 2: Picking paper
Put an ``if`` block after the ``let`` block that checks whether
`weapon` is `0`. Make sure the ``if`` block has an ``else if`` part
and an ``else`` part.
Next, add a ``show leds`` block that shows a
picture of a piece of paper:
```blocks
input.onGesture(Gesture.Shake, () => {
let weapon = Math.random(3)
if (weapon == 0) {
basic.showLeds(`
# # # # #
# . . . #
# . . . #
# . . . #
# # # # #
`)
} else if (false) {
} else {
}
})
```
## Step 3: A random rock
Now we are going to add a new picture for the micro:bit to show
when another random number comes up.
Make the ``else if`` part check if the variable `weapon` is `1`.
Then add a ``show leds`` block with a picture of a rock.
```blocks
input.onGesture(Gesture.Shake, () => {
let weapon = Math.random(3)
if (weapon == 0) {
basic.showLeds(`
# # # # #
# . . . #
# . . . #
# . . . #
# # # # #
`)
} else if (weapon == 1) {
basic.showLeds(`
. . . . .
. # # # .
. # # # .
. # # # .
. . . . .
`)
} else {
}
})
```
## Step 4: Suddenly scissors
Add a ``show leds`` block with a picture of scissors to the ``else`` part:
```blocks
input.onGesture(Gesture.Shake, () => {
let weapon = Math.random(3)
if (weapon == 0) {
basic.showLeds(`
# # # # #
# . . . #
# . . . #
# . . . #
# # # # #
`)
} else if (weapon == 1) {
basic.showLeds(`
. . . . .
. # # # .
. # # # .
. # # # .
. . . . .
`)
} else {
basic.showLeds(`
# # . . #
# # . # .
. . # . .
# # . # .
# # . . #
`)
}
})
```
### ~hint
You don't need to check if `weapon` is `2` because `2` is the only number left out of `0`, `1`, and `2`.
That's why you can use an ``else`` instead of an ``else if``.
### ~
Your game is ready! Have fun!
## Step 5: Are you the greatest?
Here is a way you can make your Rock Paper Scissors game better.
When button ``A`` is pressed,
the micro:bit will add `1` to your score.
Open the ``Game`` drawer, and then add the block ``change score by 1`` to your program,
like this:
```blocks
input.onButtonPressed(Button.A, () => {
game.addScore(1)
})
```
## Step 6: Prove you're the greatest!
After your micro:bit can add `1` to the score, show how many wins you have.
```blocks
input.onButtonPressed(Button.A, () => {
game.addScore(1)
basic.showString("WINS:")
basic.showNumber(game.score())
})
```
## Step 7: Staying honest
Success! Your micro:bit can track wins!
But what about losses?
Use the ``Game`` drawer to subtract `1` from your score when you press button `B`.
Here are all the blocks you will need:
```shuffle
input.onButtonPressed(Button.B, () => {
game.addScore(-1)
basic.showString("LOSSES:")
basic.showNumber(game.score())
})
```
## Your turn!
How else can you make your game better?
Ever hear of [Rock Paper Scissors Spock Lizard](http://www.samkass.com/theories/RPSSL.html)?