#include <Adafruit_NeoPixel.h>
#define POTPIN 34
#define PIN 32
#define NUM_PIXELS 16

Adafruit_NeoPixel ledstrip = Adafruit_NeoPixel(NUM_PIXELS, PIN, NEO_GRB + NEO_KHZ800);

void setup() {
  Serial.begin(115200);
  ledstrip.begin();
  ledstrip.show();  // Turn off all LEDs initially
}

void loop() {

  for (int i = 0; i < NUM_PIXELS; i += 1) {
    ledAanUit(i, i + 1, i + 2);
  }

  for(int i = NUM_PIXELS-1; i >=0;i-=1 ){
    ledAanUit(i, i-1,i-2);
  }
}

void ledAanUit(int i, int i2, int i3) {
  static unsigned long timestamp = 0;

  int analogValue = analogRead(POTPIN);
  int timeOut = map(analogValue, 0, 4095, 50, 500);
  Serial.print("timeout is"); Serial.println(timeOut);
  Serial.println(i);
  while (millis() - timestamp < timeOut) {
    ledstrip.setPixelColor(i, ledstrip.Color(155,0,0));
    ledstrip.setPixelColor(i2, ledstrip.Color(255, 0, 0));
    ledstrip.setPixelColor(i3, ledstrip.Color(155, 0, 0));
    ledstrip.show();
  }

  timestamp = millis();

  ledstrip.setPixelColor(i, ledstrip.Color(0, 0, 0));
  ledstrip.setPixelColor(i2, ledstrip.Color(0, 0, 0));
  ledstrip.setPixelColor(i3, ledstrip.Color(0, 0, 0));
  ledstrip.show();  // Off

}