Backlit LED Skull Sign

1// Include Libraries
2#include "FastLED.h"
3
4// Define Global  Variables
5#define NUM_LEDS 300 // How many LEDs are in the strip
6#define DATA_PIN  2 // Which pin on the Arduino?
7int fadeAmount = 5; // How fast does it fade?  e.g. Higher number = faster fade.
8int brightness = 0;
9
10// Define the LED  Array
11CRGB leds[NUM_LEDS];
12
13void setup() { 
14      // Based on which  LEDs you're using. See FastLED docs.
15      FastLED.addLeds<WS2812B, DATA_PIN,  GRB>(leds, NUM_LEDS);
16}
17
18void loop() { 
19
20  for(int i = 0; i < NUM_LEDS;  i++ )
21   {
22   leds[i].setRGB(47,49,61);  // Set Color (RGB)
23   leds[i].fadeLightBy(brightness);
24  }
25  FastLED.show();
26  brightness = brightness + fadeAmount;
27
28  if(brightness  == 0 || brightness == 255)
29  {
30    if(brightness == 0){
31      delay(20000);
32    }
33    fadeAmount = -fadeAmount ; 
34  }    
35  delay(10); 
36    
37}