#include <Adafruit_NeoPixel.h>
int dinpin = 13;
int number = 40;
Adafruit_NeoPixel ring = Adafruit_NeoPixel(number, dinpin);
void setup() {
  // put your setup code here, to run once:
  ring.begin();
}

void loop() {
  // put your main code here, to run repeatedly:
   for(int i=0; i<number; i++){
    ring.setPixelColor(i, ring.Color(0, 0, 0));
    ring.show();
    delay(100);

    if(i<10){
    ring.setPixelColor(i, ring.Color(198, 136, 247));
    ring.show();
    delay(100);     
    }
    else if(i>=10 and i<20) {
      ring.setPixelColor(i, ring.Color(159, 206, 255));
      ring.show();
      delay(100); 
    }
    else if(i>=20 and i<30){
      ring.setPixelColor(i, ring.Color(39, 255, 180));
      ring.show();
      delay(100);       
    }
    else{
      ring.setPixelColor(i, ring.Color(255, 173, 180));
      ring.show();
      delay(100);         
    }
   }

}