const int a = 2;
const int b = 3;
const int c = 5;
const int d = 8;
const int e = 7;
const int f = 10;
const int g = 9;
const int dp = 4;

void setup() {
  pinMode(a, OUTPUT);
  pinMode(b, OUTPUT);
  pinMode(c, OUTPUT);
  pinMode(d, OUTPUT);
  pinMode(e, OUTPUT);
  pinMode(f, OUTPUT);
  pinMode(g, OUTPUT);
  pinMode(dp, OUTPUT);
  Serial.begin(9600); 
}

void loop() {
  int byte = analogRead(A0);
  delay(1000);

  float volt = byte * (5.0 / 1023.0);
  float voltr = round(volt);
  Serial.println(voltr);

  if (voltr == 0) {
    digitalWrite(e, LOW);
  }
    if (voltr == 0) {
    digitalWrite(e, LOW);
  }
    if (voltr == 0) {
    digitalWrite(e, LOW);
  }

}