Fixed negative color wheel pos

Author: Red Team

music_visualizer_sparkfun_spectrum_shield.ino

@@ -12,7 +12,7 @@
 
 // LED LIGHTING SETUP
 #define LED_PIN 6
-#define NUM_LEDS 100 // 250
+#define NUM_LEDS 200 // 250
 #define BRIGHTNESS 64
 #define LED_TYPE WS2811
 #define COLOR_ORDER GRB
@@ -72,6 +72,7 @@ void setup()
 // FUNCTION TO GENERATE COLOR BASED ON VIRTUAL WHEEL
 // https://github.com/NeverPlayLegit/Rainbow-Fader-FastLED/blob/master/rainbow.ino
 CRGB Scroll(int pos) {
+ pos = abs(pos);
  CRGB color (0,0,0);
  if(pos < 85) {
  color.g = 0;
@@ -86,6 +87,16 @@ CRGB Scroll(int pos) {
  color.g = 255 - color.b;
  color.r = 1;
  }
+ /*
+ Serial.print(pos);
+ Serial.print(" -> ");
+ Serial.print("r: ");
+ Serial.print(color.r);
+ Serial.print(" g: ");
+ Serial.print(color.g);
+ Serial.print(" b: ");
+ Serial.println(color.b);
+ */
  return color;
 }
 
@@ -109,7 +120,11 @@ void doubleRainbow()
 {
  for(int i = NUM_LEDS - 1; i >= midway; i--) {
  if (i < react + midway) {
+ //Serial.print(i);
+ //Serial.print(" -> ");
  leds[i] = Scroll((i * 256 / 50 + k) % 256);
+ //Serial.print(i);
+ //Serial.print(" -> ");
  leds[(midway - i) + midway] = Scroll((i * 256 / 50 + k) % 256);
  }
  else