diff --git a/lighting_config.json b/lighting_config.json
index 12f1328..8c8161c 100644
--- a/lighting_config.json
+++ b/lighting_config.json
@@ -15,11 +15,6 @@
       "g": 0,
       "b": 255
     },
-    {
-      "r": 128,
-      "g": 0,
-      "b": 128
-    },
     {
       "r": 255,
       "g": 255,
@@ -31,19 +26,24 @@
       "b": 255
     },
     {
-      "r": 255,
+      "r": 0,
       "g": 255,
       "b": 255
     },
     {
       "r": 255,
-      "g": 128,
-      "b": 128
+      "g": 0,
+      "b": 255
+    },
+    {
+      "r": 108,
+      "g": 255,
+      "b": 255
     }
   ],
   "selected_color_indices": [
-    4,
-    3
+    5,
+    2
   ],
   "pattern_parameters": {
     "alternating": {
@@ -127,6 +127,13 @@
       "delay": 100,
       "n1": 21,
       "n2": 60,
+      "n3": 28,
+      "n4": 1
+    },
+    "ap": {
+      "delay": 100,
+      "n1": 10,
+      "n2": 10,
       "n3": 1,
       "n4": 1
     }
diff --git a/src/control_server.py b/src/control_server.py
index 51f474b..bafd472 100644
--- a/src/control_server.py
+++ b/src/control_server.py
@@ -384,29 +384,34 @@ class LightingController:
         color_b = self._palette_color(1)
         phase = self.beat_index % 2
 
+        # Set the default color based on phase so both bar groups swap each beat
+        default_color = color_a if phase == 0 else color_b
+        alt_color_for_swap = color_b if phase == 0 else color_a
+        # Avoid pure white edge-case on some bars by slightly reducing to 254
+        if default_color == (255, 255, 255):
+            default_color = (254, 254, 254)
+        if alt_color_for_swap == (255, 255, 255):
+            alt_color_for_swap = (254, 254, 254)
+
         payload = {
             "d": {
                 "t": "b",
                 "pt": "a",  # alternating
                 "n1": self.n1,
                 "n2": self.n2,
-                # Default color for bars not overridden (keeps payload small)
-                "cl": [color_a],
+                # Default color for non-swapped bars changes with phase
+                "cl": [default_color],
                 "s": phase,
             }
         }
 
         # Bars in this list will have inverted phase and explicit color override
-        swap_bars = ["101", "103", "105", "107"]
-        for bar_name in LED_BAR_NAMES:
-            if bar_name in swap_bars:
-                # Invert phase and explicitly set alternate color
-                inv_phase = (phase + 1) % 2
-                alt_color = color_b if phase == 0 else color_a
-                payload[bar_name] = {"s": inv_phase, "cl": [alt_color]}
-            else:
-                # Keep default (no extra fields) to save bytes
-                payload[bar_name] = {}
+        # Flip grouping so first four bars (100-103) use default color (color_a on even beats)
+        swap_bars = ["104", "105", "106", "107"]
+        # Only include overrides for swapped bars to minimize payload size
+        for bar_name in swap_bars:
+            inv_phase = (phase + 1) % 2
+            payload[bar_name] = {"s": inv_phase, "cl": [alt_color_for_swap]}
 
         await self.led_controller.send_data(payload)