108 lines
2.1 KiB
Markdown
108 lines
2.1 KiB
Markdown
# flashing heart
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### ~avatar avatar
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Use the LEDs to display a flashing heart!
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### ~
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## Step 1
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Use [show leds](/reference/basic/show-leds) and make your code look like this:
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```blocks
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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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## Step 2
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Add a [pause](/reference/basic/pause) to wait and [clear screen](/reference/basic/clear-screen) to turn off the LEDs.
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```blocks
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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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basic.pause(500);
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basic.clearScreen();
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```
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## Step 3
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Put a [forever loop](/reference/basic/forever) around it to repeat the animation.
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```blocks
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basic.forever(() => {
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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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basic.pause(500);
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basic.clearScreen();
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})
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```
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## Step 4
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Add a [pause](/reference/basic/pause) to wait after clearing the screen.
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```blocks
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basic.forever(() => {
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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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basic.pause(500);
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basic.clearScreen();
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basic.pause(500);
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})
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```
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## Send your heartbeats over radio!
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Do you have a second @boardname@ at hand? You could use radio and send your heartbeats to other
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@boardname@ and show a heart when you receive one.
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* move the code in the **forever** inside
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a [on data packet received](/reference/radio/on-data-packet-received) handler.
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The handler will run whenever a message is received from another @boardname@.
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* use [send number](/reference/radio/send-number) and [pause](/reference/basic/pause)
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to broadcast a packet of data every second.
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```blocks
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basic.forever(() => {
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radio.sendNumber(0)
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basic.pause(1000)
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})
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radio.onDataPacketReceived(({receivedNumber}) => {
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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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basic.pause(500)
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basic.clearScreen()
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basic.pause(500)
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})
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```
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Download the .hex file onto both @boardname@ and try it out!
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```package
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radio
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``` |