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Update keys.md

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Added example for use of .after_keys_handler() to change RGB settings and add serial print.
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idesignstuff 2022-02-27 19:38:19 -06:00 committed by Kyle Brown
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@ -120,6 +120,16 @@ hack up in CircuitPython, which also retaining layer-switching abilities or
whatever the stock handler is, you're covered. This also means you can add whatever the stock handler is, you're covered. This also means you can add
completely new functionality to KMK by writing your own handler. completely new functionality to KMK by writing your own handler.
Here's an example of an after_press_handler to change the RGB lights with a layer change:
```python
LOWER = KC.DF(LYR_LOWER) #Set layer to LOWER
def low_lights(key, keyboard, *args):
print('Lower Layer') #serial feedback
keyboard.pixels.set_hsv_fill(0, 100, 255) #RGB extension call to set (H,S,V) values
LOWER.after_press_handler(low_lights) #call the key with the after_press_handler
```
Here's an example of a lifecycle hook to print a giant Shrek ASCII art. It Here's an example of a lifecycle hook to print a giant Shrek ASCII art. It
doesn't care about any of the arguments passed into it, because it has no doesn't care about any of the arguments passed into it, because it has no
intentions of modifying the internal state. It is purely a [side intentions of modifying the internal state. It is purely a [side