int readPin =A2;
int readPin1 =A3;
int readPin2 =A4;
int readPin3 =A0;
int readValue ;
float Voltage;
int redPin =2;
int bluePin=11;
int greenPin=6;
int yelowPin=13;


void setup() {
  // put your setup code here, to run once:
pinMode(readPin, INPUT);
pinMode(redPin, OUTPUT);
pinMode(readPin1, INPUT);
pinMode(bluePin, OUTPUT);
pinMode(readPin2, INPUT);
pinMode(greenPin, OUTPUT);
pinMode(readPin3, INPUT);
pinMode(yelowPin, OUTPUT);
Serial.begin(9600);
}

void loop() {
  // put your main code here, to run repeatedly:

readValue = analogRead(readPin);
Voltage = readValue *5./1023.;
Serial.println(Voltage);

if (Voltage>4){
  digitalWrite(redPin , HIGH);
}else{
  digitalWrite(redPin, LOW);
}
readValue = analogRead(readPin1);
Voltage = readValue *5./1023.;
Serial.println(Voltage);

if (Voltage>4){
  digitalWrite(bluePin , HIGH);
}else{
  digitalWrite(bluePin, LOW);
}
readValue = analogRead(readPin2);
Voltage = readValue *5./1023.;
Serial.println(Voltage);

if (Voltage>2){
  digitalWrite(greenPin, HIGH);
}else{
  digitalWrite(greenPin, LOW);
}
readValue = analogRead(readPin3);
Voltage = readValue *5./1023.;
Serial.println(Voltage);

if (Voltage>4){
  digitalWrite(yelowPin , HIGH);
}else{
  digitalWrite(yelowPin, LOW);
}
}