Added alternating led underglow pattern (#3498)

* added alternating led pattern

* added alternating with rgblight_config values

* removed my comments

1 files changed, 2 insertions, 1 deletions

diff --git a/quantum/rgblight.h b/quantum/rgblight.h
index 0f7b5ffb5..ba010dfae 100644
--- a/quantum/rgblight.h
+++ b/quantum/rgblight.h
@@ -17,7 +17,7 @@
 #define RGBLIGHT_H
 
 #ifdef RGBLIGHT_ANIMATIONS
-        #define RGBLIGHT_MODES 35
+        #define RGBLIGHT_MODES 36
 #else
         #define RGBLIGHT_MODES 1
 #endif
@@ -166,5 +166,6 @@ void rgblight_effect_snake(uint8_t interval);
 void rgblight_effect_knight(uint8_t interval);
 void rgblight_effect_christmas(void);
 void rgblight_effect_rgbtest(void);
+void rgblight_effect_alternating(void);
 
 #endif