#include <Adafruit_NeoPixel.h>
int LedN = 40;
int Din = 10;
Adafruit_NeoPixel ring = Adafruit_NeoPixel(LedN, Din);

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 < LedN; i++){

  ring.setPixelColor(i, ring.Color(0,0,0));
  ring.show();
  delay(100);

  if (i < 10){
    ring.setPixelColor(i, ring.Color(245,181,234));
    ring.show();
    delay(500);
  }
  else if (i > 10, i < 20){
    ring.setPixelColor(i, ring.Color(230,106,210));
    ring.show();
    delay(500);
  }
  else if (i > 20, i < 30){
    ring.setPixelColor(i, ring.Color(182,207,246));
    ring.show();
    delay(500);
  }
  else {
    ring.setPixelColor(i, ring.Color(106,171,236));
    ring.show();
    delay(500);
  }
}
}