#include "Adafruit_NeoPixel.h"

#define led_n 25
#define led_p 5
byte pix = 4;
byte k = 2;
Adafruit_NeoPixel strip = Adafruit_NeoPixel(led_n, led_p, NEO_GRB + NEO_KHZ800);



void setup() 
{
  strip.begin();
  strip.show();  
}

void loop() 
{
  
  

  strip.setPixelColor(pix, strip.Color(250, 0, 0));
  strip.show();

  delay(100);

  strip.setPixelColor(pix, strip.Color(0, 0, 0));
  strip.show();

  pix +=5;
  

  if (pix < 25)
  {

  } 
  else 
  {
    pix = 0;
    pix = pix - k;
    k++;
    if (k<5){}
    else {k = 0;}

  }

}