#include "FastLED.h"

#define NUM_LEDS  12    // Enter the total number of LEDs on the strip
#define PIN       5     // LED signal Pin

int LightWidth = 3;     //Set the number of active LED's
int delayDuration = 400;


CRGB leds[NUM_LEDS];

void setup() {
  Serial.begin(9600);
  FastLED.addLeds<WS2812B, PIN, GRB>(leds, NUM_LEDS).setCorrection(TypicalLEDStrip);
  FastLED.setMaxPowerInVoltsAndMilliamps(5, 500);    // limit power of LED strip to 5V, 500mA
  FastLED.clear();                                    // Init LEDs to "off"
}

void loop() {
  //////(int red, int green, int blue, int LightWidth, int delayDuration)
  Beacon(204, 136, 0, LightWidth, delayDuration);
}

void Beacon(int red, int green, int blue, int LightWidth, int delayDuration){
  int LightWidthFix = LightWidth - 1;

  for(int i = 0; i <= ((NUM_LEDS -LightWidth) + LightWidthFix); i++) {
    FastLED.clear();
    FastLED.show();
    
    leds[i].setRGB(red/10, green/10, blue/10); ///Create Primary Leading LED
      
    int j;                                      ///Create second Trailing LED
    if (i < LightWidthFix ) {
    j = (i + NUM_LEDS) - LightWidthFix;
    leds[j].setRGB(red/10, green/10, blue/10);   
    }
    else{
    j = i -LightWidthFix;      
    leds[j].setRGB(red/10, green/10, blue/10); 
    }    

    if ((i>0)&&(i<LightWidthFix)){                ///Fill from Low fix
      Serial.println("FILL LOW");
      for (int l = i; l >= 0; l--) {
        leds[l].setRGB(red, green, blue);
       }
    }
    
    if ((j<NUM_LEDS)&&(j>(NUM_LEDS-LightWidth))){ ///Fill To High fix
      Serial.println("FILL HIGH");
      for (int l = j; l < NUM_LEDS; l++) {
        leds[l].setRGB(red, green, blue);
       }
    }
    
    if ((i>=LightWidthFix)&&(j<=(NUM_LEDS-LightWidth))){  ///Fill To Main Cycle
      Serial.println("FILL MAIN");
      for (int t = 0; t <= LightWidthFix; t++){
      leds[j+t].setRGB(red, green, blue);
      }
    }

    

    FastLED.show();
    delay(delayDuration);
  }

}