#include <Adafruit_NeoPixel.h> //Neopixel library
#define PIXEL_PIN    6    // Digital IO pin connected to the NeoPixels.
#define PIXEL_COUNT  5    // Number of pixels

Adafruit_NeoPixel strip = Adafruit_NeoPixel(PIXEL_COUNT, PIXEL_PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  // Setup code, to run once:
  strip.begin();          //Start the strip operation
  strip.show();           //Initialize all pixels to OFf
  }

void loop() {
  // Main code, to run repeatedly:
  strip.setBrightness(50); //Global brightness for the strip
  for(int i = 0; i < 5; i++){  //Increase in the number of illuminated pixels with this color  
    strip.setPixelColor(i, 252, 102, 3); //Blue position on RGB values
    strip.show(); //Turn on the pixels
    delay(1500); //Delay
  }
  for(int i = 4; i >= 0; i--){  //Decrease in the number of illuminated pixels with this color
    strip.setPixelColor(i, 252, 3, 3); //Red position on RGB values
    strip.show(); //Turn on the pixels
    delay(1000); //Delay
  }
 }