int LED[] = {2,4,16,17,5};
#define VR 34

void setup() {
  Serial.begin(115200);
  for(int i = 0 ; i <= 4 ; i = i + 1){
    pinMode(LED[i], OUTPUT);
    pinMode(VR, INPUT);
  }
}

void loop() {
  int value = map(analogRead(34),0,4095,0,5);

  Serial.print("เดิม ");
  Serial.print(analogRead(34));
  Serial.print(" ใหม่ ");
  Serial.println(value);

  for(int i = 0 ; i <= value ; i = i + 1){
    digitalWrite(LED[i-1],1);
  }
  for(int i = 5 ; i > value ; i = i - 1){
    digitalWrite(LED[i-1],0);
    }
}