153 lines
4.0 KiB
Markdown
153 lines
4.0 KiB
Markdown
# Rock Paper Scissors
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## Introduction @unplugged
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Use the accelerometer and the screen to build a **Rock Paper Scissors** game
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that you can play with your friends!
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## Step 1 @fullscreen
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Add a ``||input:on shake||`` block to run code when when you shake the @boardname@.
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```blocks
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input.onGesture(Gesture.Shake, () => {
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})
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```
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## Step 2 @fullscreen
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Add a ``tool`` variable to store a random number computed with ``||math:pick random||``.
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When you shake the @boardname@, it should pick a random number from `0` to `2`
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and store it in the variable named ``tool``.
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```blocks
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let tool = 0;
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input.onGesture(Gesture.Shake, () => {
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tool = Math.randomRange(0, 2)
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})
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```
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In a later step, each of the possible numbers (`0`, `1`, or `2`) is matched to its own picture. The picture is shown on the LEDs when its matching number is picked.
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## Step 3 @fullscreen
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Place an ``||logic:if||`` block under the ``||math:pick random||`` and check whether ``tool`` is equal to ``0``.
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Add a ``||basic:show leds||`` block that shows a picture of a piece of paper. The number `0` will mean paper.
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```blocks
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let tool = 0;
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input.onGesture(Gesture.Shake, () => {
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tool = Math.randomRange(0, 2)
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if (tool == 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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}
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})
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```
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## Step 4 @fullscreen
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Click on the **SHAKE** button in the simulator. If you try enough times, you should see a picture of paper on the screen.
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## Step 5 @fullscreen
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Click the ``+`` button to add an ``||logic:else||`` section.
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## Step 6 @fullscreen
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Add a ``||basic:show leds||`` block inside the ``||logic:else||``. Make a picture of a scissors in the LEDs.
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```blocks
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let tool = 0;
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input.onGesture(Gesture.Shake, () => {
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tool = Math.randomRange(0, 2)
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if (tool == 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 {
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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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## Step 7 @fullscreen
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Click the ``+`` button again to add an ``||logic:else if||`` section. Now, add a conditional block for ``||logic:tool = 1||`` to the condition in ``||logic:else if||``. Since ``tool`` can only be `0`, `1`, or `2`, your code is covering all possible cases!
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## Step 8 @fullscreen
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Get one more ``||basic:show leds||`` block and put it in the ``||logic:else if||``. Make a picture of a rock in the LEDs.
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```blocks
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let tool = 0;
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input.onGesture(Gesture.Shake, () => {
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tool = Math.randomRange(0, 2)
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if (tool == 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 (tool == 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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## Step 9 @fullscreen
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Click on the **SHAKE** button in the simulator and check to see that each image is showing up.
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## Step 10 @fullscreen
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If you have a @boardname@, click on ``|Download|`` and follow the instructions to get the code
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onto your @boardname@. Your game is ready! Gather your friends and play Rock Paper Scissors!
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