// For: https://forum.arduino.cc/t/my-photoresistor-is-always-returning-1023/1029914
// 
// Changes:
//   Formatted the text
//   Added comments
//   Changed "Recieving" into "Receiving"


const int IR = 12;       // output pin for "IR" led
const int red = 11;      // output pin for "red" led 
const int UV = 13;       // output pin for "UV" led
const int input = A0;    // LDR analog input
int cc = 0;              // counter, increments every loop(), never resets
int cc2 = 1;             // counter within counter within condition

void setup() {
  // put your setup code here, to run once:
  Serial.begin(9600);

  pinMode(IR, OUTPUT);
  pinMode(UV, OUTPUT);
  pinMode(red, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (cc % 3 == 0) 
  {
    digitalWrite(IR, LOW);
    digitalWrite(red, LOW);
    digitalWrite(UV, LOW);

    if (cc2 == 1) 
    {
      digitalWrite(UV, HIGH);
      Serial.println(analogRead(input));
      cc2++;
    }
    else if (cc2 == 2) 
    {
      digitalWrite(red, HIGH);
      Serial.println(analogRead(input));
      cc2++;
    }
    else if (cc2 == 3) 
    {
      digitalWrite(IR, HIGH);
      Serial.println(analogRead(input));
      cc2 = 1;
    }
  }
  else if (cc % 2 == 0) 
  {
    if (analogRead(input) > 160) 
    {
      Serial.println("Receiving....");
    }
    else 
    {
      Serial.println("....");
    }
  }
  delay(1000);
  cc++;
}