Adding loop function

converter/shows/blue_breath.txt

@@ -0,0 +1,12 @@
+// Blue breath — home / reset show (always index 0)
+// A slow, natural breathing effect in deep blue.
+// Loops continuously as the default show.
+//
+// mode: loop
+// Format: #RRGGBB, duration_ms
+
+#050018,    0   // snap to near-black blue — sets the starting point
+#2020FF, 2500   // breathe in — slow rise to bright blue
+#2020FF,  400   // hold at peak
+#050018, 2500   // breathe out — slow fall to near-black
+#050018,  800   // pause before next breath