Added effect 'rainbow'.

include/node.h

@@ -26,6 +26,7 @@ class Node {
 		Node(uint16_t number, Coords c, uint8_t direction);
 		Node* create_neighbour(uint8_t edge);
 		Coords coords_at_direction(uint8_t edge);
+		uint16_t distance_from_start = 0;
 
 		void blend_to(CRGB color, uint16_t effect_id=0, uint8_t effect_speed=0);
 		void set_color(CRGB color);

include/prototypes.h

@@ -24,7 +24,8 @@ enum AnimationMode {
 	AM_OFF,
 	AM_ERROR,
 	AM_NONE,
-	AM_STATIC
+	AM_STATIC,
+	AM_RAINBOW
 };
 
 extern std::map<AnimationMode, const char*> animation_mode_names;