> For the complete documentation index, see [llms.txt](https://nkust.gitbook.io/halocode/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nkust.gitbook.io/halocode/master.md).

# HaloCode光環板簡介

自從micro:bit開始流行起來之後，漸漸地許多廠家也開始研發類似和相容的板子，而HaloCode是其中的佼佼者，價錢差不多，功能各有所長，以下的連結可以看到HaloCode這塊板子的功能以及規格方面的詳細介紹：

{% embed url="<http://ipoemaker.com/5001551>" %}

它的大小和micro:bit差不多，不過在外觀上最大的差異是HaloCode只有一個按鈕和12個LED燈，但是雖然只有12顆LED，但是當你一把HaloCode接上電源時一定對這12顆LED大為驚艷，因為它們全具有全彩高亮度功能，質感非常好喔。先來看看示範程式（這塊板子可以使用積木和Python編寫程式，但是何老師還是喜歡使用Python啦）：

```python
import event, halo
import random
index = 0

@event.button_pressed
def on_start():
    global index
    index = 1
    old_index = 1
    init_delay = 0.01
    while True:
        halo.led.show_single(old_index, 0, 0, 0)
        halo.led.show_single(index, 255, 255, 0)
        old_index = index
        index = index + 1
        if index > 12:
            index = 1
        time.sleep(init_delay)
        init_delay += 0.01
        if init_delay > 0.5 and random.randint(1, 10) == 1:
            break
```

以下是執行的結果示範影片：

{% embed url="<https://www.youtube.com/watch?v=w1OcPc-UrUM>" %}


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