#include <Adafruit_NeoPixel.h>

#define fr 0
#define fg 0
#define fb 0
int vx=0;
unsigned long cm=0;
unsigned long pm=0;
unsigned long im=0;



Adafruit_NeoPixel 
Adafruit_NeoPixel fan(8,2);






void setup()
{
Serial.begin;
fan.begin();
fan.show();

  
}

void loop()
{
 
  

  
  fan.setPixelColor(vx-1,0,0,0);
  if(vx>=8){
    vx=0;
    
  }
  fan.setPixelColor(vx,0,0,200);
  
  vx=vx+1;
  
  
fan.show();
fan.show();

  delay(100);
  
  
  
}