Tweak the Christmas animation effect to be less harsh on the eyes (#7648)

* Tweak the Christmas animation effect to be less harsh on the eyes

* Further improve the tweaked Christmas animation code

- Use constants where it makes sense
- Instead of complicated math, use a static variable to keep track if it's animating from or to red
- Don't use pow (but a simple macro instead)
- Using floating point math is necessary for the fraction in the cubic bezier function to work

* Update docs for the tweaked Christmas animation effect

* Further improve memory usage

- Don't use floats, but 32 bit ints instead (where needed)
- Replace limits.h with constant

* Fix typo

1 files changed, 12 insertions, 12 deletions

diff --git a/docs/feature_rgblight.md b/docs/feature_rgblight.md
index 26e01da50..23b2886ed 100644
--- a/docs/feature_rgblight.md
+++ b/docs/feature_rgblight.md
@@ -126,19 +126,19 @@ Use these defines to add or remove animations from the firmware. When you are ru
 
 The following options are used to tweak the various animations:
 
-|Define                              |Default      |Description                                                                          |
-|------------------------------------|-------------|-------------------------------------------------------------------------------------|
+|Define                              |Default      |Description                                                                                    |
+|------------------------------------|-------------|-----------------------------------------------------------------------------------------------|
 |`RGBLIGHT_EFFECT_BREATHE_CENTER`    |*Not defined*|If defined, used to calculate the curve for the breathing animation. Valid values are 1.0 to 2.7 |
-|`RGBLIGHT_EFFECT_BREATHE_MAX`       |`255`        |The maximum brightness for the breathing mode. Valid values are 1 to 255             |
-|`RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL`|`1000`       |How long to wait between light changes for the "Christmas" animation, in milliseconds|
-|`RGBLIGHT_EFFECT_CHRISTMAS_STEP`    |`2`          |The number of LEDs to group the red/green colors by for the "Christmas" animation    |
-|`RGBLIGHT_EFFECT_KNIGHT_LED_NUM`    |`RGBLED_NUM` |The number of LEDs to have the "Knight" animation travel                             |
-|`RGBLIGHT_EFFECT_KNIGHT_LENGTH`     |`3`          |The number of LEDs to light up for the "Knight" animation                            |
-|`RGBLIGHT_EFFECT_KNIGHT_OFFSET`     |`0`          |The number of LEDs to start the "Knight" animation from the start of the strip by    |
-|`RGBLIGHT_RAINBOW_SWIRL_RANGE`      |`255`        |Range adjustment for the rainbow swirl effect to get different swirls                |
-|`RGBLIGHT_EFFECT_SNAKE_LENGTH`      |`4`          |The number of LEDs to light up for the "Snake" animation                             |
-|`RGBLIGHT_EFFECT_TWINKLE_LIFE`      |`75`         |Adjusts how quickly each LED brightens and dims when twinkling (in animation steps)  |
-|`RGBLIGHT_EFFECT_TWINKLE_PROBABILITY`|`1/127`     |Adjusts how likely each LED is to twinkle (on each animation step)                   |
+|`RGBLIGHT_EFFECT_BREATHE_MAX`       |`255`        |The maximum brightness for the breathing mode. Valid values are 1 to 255                       |
+|`RGBLIGHT_EFFECT_CHRISTMAS_INTERVAL`|`40`         |How long (in milliseconds) to wait between animation steps for the "Christmas" animation       |
+|`RGBLIGHT_EFFECT_CHRISTMAS_STEP`    |`2`          |The number of LEDs to group the red/green colors by for the "Christmas" animation              |
+|`RGBLIGHT_EFFECT_KNIGHT_LED_NUM`    |`RGBLED_NUM` |The number of LEDs to have the "Knight" animation travel                                       |
+|`RGBLIGHT_EFFECT_KNIGHT_LENGTH`     |`3`          |The number of LEDs to light up for the "Knight" animation                                      |
+|`RGBLIGHT_EFFECT_KNIGHT_OFFSET`     |`0`          |The number of LEDs to start the "Knight" animation from the start of the strip by              |
+|`RGBLIGHT_RAINBOW_SWIRL_RANGE`      |`255`        |Range adjustment for the rainbow swirl effect to get different swirls                          |
+|`RGBLIGHT_EFFECT_SNAKE_LENGTH`      |`4`          |The number of LEDs to light up for the "Snake" animation                                       |
+|`RGBLIGHT_EFFECT_TWINKLE_LIFE`      |`75`         |Adjusts how quickly each LED brightens and dims when twinkling (in animation steps)            |
+|`RGBLIGHT_EFFECT_TWINKLE_PROBABILITY`|`1/127`     |Adjusts how likely each LED is to twinkle (on each animation step)                             |
 
 ### Example Usage to Reduce Memory Footprint
   1. Remove `RGBLIGHT_ANIMATIONS` from `config.h`.