Add reverse checkmark for Twinklecat (wled#4728)

reverse slowly fades in random lights, and then instantly turns them off.

Author: benjamw

wled00/FX.cpp

@@ -2606,9 +2606,11 @@ static CRGB twinklefox_one_twinkle(uint32_t ms, uint8_t salt, bool cat)
     // This is like 'triwave8', which produces a
     // symmetrical up-and-down triangle sawtooth waveform, except that this
     // function produces a triangle wave with a faster attack and a slower decay
-    if (cat) //twinklecat, variant where the leds instantly turn on
-    {
+    if (cat) { //twinklecat, variant where the leds instantly turn on and fade off
       bright = 255 - ph;
+      if (SEGMENT.check2) { //reverse checkbox, reverses the leds to fade on and instantly turn off
+        bright = ph;
+      }
     } else { //vanilla twinklefox
       if (ph < 86) {
       bright = ph * 3;
@@ -2716,7 +2718,7 @@ uint16_t mode_twinklecat()
 {
   return twinklefox_base(true);
 }
-static const char _data_FX_MODE_TWINKLECAT[] PROGMEM = "Twinklecat@!,Twinkle rate,,,,Cool;!,!;!";
+static const char _data_FX_MODE_TWINKLECAT[] PROGMEM = "Twinklecat@!,Twinkle rate,,,,Cool,Reverse;!,!;!";
 
 
 uint16_t mode_halloween_eyes()