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Galen Nickel
2017-12-06 20:23:17 -08:00
committed by Peli de Halleux
parent 7ef65715d7
commit f7a2a24ed8
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docs/projects/fireflies.md
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@ -9,16 +9,16 @@ Turn your @boardname@ into fireflies.
https://youtu.be/ZGvtnE1Wy6U
## How do Fireflies synchronise?
## How do Fireflies synchronize?
Go to http://ncase.me/fireflies/ and read about the fireflies synchronization phenomenon.
## Code
## Code the firefly
We want to create virtual fireflies using multiple @boardname@ (each @boardname@ acts as a firefly).
Let's review some of the key points of the article:
We want to create virtual fireflies using multiple @boardname@s (each @boardname@ acts as a firefly).
Let's review some of the key points from the article:
## "Each firefly has its own individual internal clock"
### "Each firefly has its own individual internal clock..."
A clock in this case is like a counter, so we will start by adding a ``clock`` variable to our program.
@ -27,10 +27,10 @@ A clock in this case is like a counter, so we will start by adding a ``clock`` v
let clock = 1
```
## "and every time the clock “strikes twelve”, it flashes."
### "...and every time the clock 'strikes twelve', it flashes."
We can use a [forever](/reference/basic/forever) loop to repeat code that increments the clock.
When the clock reaches "noon" (let's pick `8`), we turn on the screen briefly (by using the game score animation)
We can use a ``||basic:forever||`` loop to repeat code that increments the clock.
When the clock reaches "noon" (let's pick `8` as noon), we turn on the screen briefly (by using the game score animation)
```block
// the clock ticker
@ -53,12 +53,11 @@ basic.forever(() => {
})
```
## Step 1: when you see a nearby firefly flash, nudge your clock a little bit forward.
### When you see a nearby firefly flash, nudge your clock a little bit forward
The @boardname@ can send radio messages to neighbor @boardname@.
We can use these messages to simulate the "flashes" of light.
The @boardname@ can send radio messages to a neighbor @boardname@. We can use these messages to simulate the "flashes" of light.
* When a firefly flashes, it also sends a number over radio using [radio send number](/reference/radio/send-number).
When a firefly flashes, it also sends a number over radio using ``||radio:radio send number||``:
```block
// the clock ticker
@ -83,7 +82,7 @@ basic.forever(() => {
})
```
* When a firefly receives a radio packet, it increments its clock by one.
When a firefly receives a radio packet, it increments its clock by one:
```block
// the clock ticker
@ -94,13 +93,13 @@ radio.onDataPacketReceived(() => {
})
```
## Putting all together
## Put it all together
https://youtu.be/XzZeB4yYnEw
Download this program on as many @boardname@ as you can find and try it out in a dark room!
Download this program on as many @boardname@s as you can find and try it out in the dark!
(We've added a [radio set group](/reference/radio/set-group) block to specify which group the firefly will communicate on).
**Note:** We've added a ``||radio:radio set group||`` block to specify which group the firefly will communicate on.
```blocks
// the clock ticker