int odczyt;
float Nap = 0;

const int led1 = 2;
const int led2 = 5;
const int led3 = 7;
const int led4 = 9;
const int led5 = 11;


void setup() {
Serial.begin(9600);
pinMode(A0, INPUT);
}

void loop() {
odczyt = analogRead(A0);
Nap = odczyt* (5/1024.0);
Serial.println(Nap);

if(Nap <= 1){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);
}
else if (Nap>1 && Nap < 2){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);
}
else if (Nap >=2 && Nap < 3){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);
}
else if (Nap>=3 && Nap < 4){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, LOW);
}
else if (Nap>=4 && Nap <= 5){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  digitalWrite(led5, HIGH);
}
else{
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led5, LOW);
 }
}