diff --git a/wled00/FX.cpp b/wled00/FX.cpp
index eec9192bb..d64e6f80e 100644
--- a/wled00/FX.cpp
+++ b/wled00/FX.cpp
@@ -445,28 +445,45 @@ uint16_t WS2812FX::mode_theater_chase_rainbow(void) {
 /*
  * Running lights effect with smooth sine transition base.
  */
-uint16_t WS2812FX::running_base(bool saw) {
+uint16_t WS2812FX::running_base(bool saw, bool dual=false) {
   uint8_t x_scale = SEGMENT.intensity >> 2;
   uint32_t counter = (now * SEGMENT.speed) >> 9;
 
   for(uint16_t i = 0; i < SEGLEN; i++) {
-    uint8_t s = 0;
-    uint8_t a = i*x_scale - counter;
+    uint16_t a = i*x_scale - counter;
     if (saw) {
+      a &= 0xFF;
       if (a < 16)
       {
         a = 192 + a*8;
       } else {
         a = map(a,16,255,64,192);
       }
+      a = 255 - a;
     }
-    s = sin8(a);
-    setPixelColor(i, color_blend(color_from_palette(i, true, PALETTE_SOLID_WRAP, 0), SEGCOLOR(1), s));
+    uint8_t s = dual ? sin_gap(a) : sin8(a);
+    uint32_t ca = color_blend(SEGCOLOR(1), color_from_palette(i, true, PALETTE_SOLID_WRAP, 0), s);
+    if (dual) {
+      uint16_t b = (SEGLEN-1-i)*x_scale - counter;
+      uint8_t t = sin_gap(b);
+      uint32_t cb = color_blend(SEGCOLOR(1), color_from_palette(i, true, PALETTE_SOLID_WRAP, 2), t);
+      ca = color_blend(ca, cb, 127);
+    }
+    setPixelColor(i, ca);
   }
   return FRAMETIME;
 }
 
 
+/*
+ * Running lights in opposite directions.
+ * Idea: Make the gap width controllable with a third slider in the future
+ */
+uint16_t WS2812FX::mode_running_dual(void) {
+  return running_base(false, true);
+}
+
+
 /*
  * Running lights effect with smooth sine transition.
  */
@@ -1335,14 +1352,6 @@ uint16_t WS2812FX::tricolor_chase(uint32_t color1, uint32_t color2) {
 }
 
 
-/*
- * Alternating white/red/black pixels running. PLACEHOLDER
- */
-uint16_t WS2812FX::mode_circus_combustus(void) {
-  return tricolor_chase(RED, WHITE);
-}
-
-
 /*
  * Tricolor chase mode
  */
diff --git a/wled00/FX.h b/wled00/FX.h
index 2cd4b688d..62de9b491 100644
--- a/wled00/FX.h
+++ b/wled00/FX.h
@@ -168,7 +168,7 @@
 #define FX_MODE_POLICE_ALL              49
 #define FX_MODE_TWO_DOTS                50
 #define FX_MODE_TWO_AREAS               51
-#define FX_MODE_CIRCUS_COMBUSTUS        52
+#define FX_MODE_RUNNING_DUAL            52
 #define FX_MODE_HALLOWEEN               53
 #define FX_MODE_TRICOLOR_CHASE          54
 #define FX_MODE_TRICOLOR_WIPE           55
@@ -505,7 +505,7 @@ class WS2812FX {
       _mode[FX_MODE_POLICE_ALL]              = &WS2812FX::mode_police_all;
       _mode[FX_MODE_TWO_DOTS]                = &WS2812FX::mode_two_dots;
       _mode[FX_MODE_TWO_AREAS]               = &WS2812FX::mode_two_areas;
-      _mode[FX_MODE_CIRCUS_COMBUSTUS]        = &WS2812FX::mode_circus_combustus;
+      _mode[FX_MODE_RUNNING_DUAL]            = &WS2812FX::mode_running_dual;
       _mode[FX_MODE_HALLOWEEN]               = &WS2812FX::mode_halloween;
       _mode[FX_MODE_TRICOLOR_CHASE]          = &WS2812FX::mode_tricolor_chase;
       _mode[FX_MODE_TRICOLOR_WIPE]           = &WS2812FX::mode_tricolor_wipe;
@@ -636,6 +636,7 @@ class WS2812FX {
       getColorOrder(void),
       gamma8(uint8_t),
       gamma8_cal(uint8_t, float),
+      sin_gap(uint16_t),
       get_random_wheel_index(uint8_t);
 
     int8_t
@@ -729,7 +730,7 @@ class WS2812FX {
       mode_police_all(void),
       mode_two_dots(void),
       mode_two_areas(void),
-      mode_circus_combustus(void),
+      mode_running_dual(void),
       mode_bicolor_chase(void),
       mode_tricolor_chase(void),
       mode_tricolor_wipe(void),
@@ -829,7 +830,7 @@ class WS2812FX {
       dynamic(bool),
       scan(bool),
       theater_chase(uint32_t, uint32_t, bool),
-      running_base(bool),
+      running_base(bool,bool),
       larson_scanner(bool),
       sinelon_base(bool,bool),
       dissolve(uint32_t),
@@ -884,7 +885,7 @@ const char JSON_mode_names[] PROGMEM = R"=====([
 "Sparkle","Sparkle Dark","Sparkle+","Strobe","Strobe Rainbow","Strobe Mega","Blink Rainbow","Android","Chase","Chase Random",
 "Chase Rainbow","Chase Flash","Chase Flash Rnd","Rainbow Runner","Colorful","Traffic Light","Sweep Random","Running 2","Aurora","Stream",
 "Scanner","Lighthouse","Fireworks","Rain","Tetrix","Fire Flicker","Gradient","Loading","Police","Police All",
-"Two Dots","Two Areas","Circus","Halloween","Tri Chase","Tri Wipe","Tri Fade","Lightning","ICU","Multi Comet",
+"Two Dots","Two Areas","Running Dual","Halloween","Tri Chase","Tri Wipe","Tri Fade","Lightning","ICU","Multi Comet",
 "Scanner Dual","Stream 2","Oscillate","Pride 2015","Juggle","Palette","Fire 2012","Colorwaves","Bpm","Fill Noise",
 "Noise 1","Noise 2","Noise 3","Noise 4","Colortwinkles","Lake","Meteor","Meteor Smooth","Railway","Ripple",
 "Twinklefox","Twinklecat","Halloween Eyes","Solid Pattern","Solid Pattern Tri","Spots","Spots Fade","Glitter","Candle","Fireworks Starburst",
diff --git a/wled00/FX_fcn.cpp b/wled00/FX_fcn.cpp
index 9e0e7990e..df69532f0 100644
--- a/wled00/FX_fcn.cpp
+++ b/wled00/FX_fcn.cpp
@@ -738,6 +738,12 @@ uint16_t WS2812FX::triwave16(uint16_t in)
   return 0xFFFF - (in - 0x8000)*2;
 }
 
+uint8_t WS2812FX::sin_gap(uint16_t in) {
+  if (in & 0x100) return 0;
+  //if (in > 255) return 0;
+  return sin8(in + 192); //correct phase shift of sine so that it starts and stops at 0
+}
+
 /*
  * Generates a tristate square wave w/ attac & decay 
  * @param x input value 0-255