int rpin = 7;
int bpin = 2;
int gpin = 1;
int epin = A0;
int tpin = 8;
void setup() {
  // put your setup code here, to run once:
  pinMode(epin, INPUT);
  pinMode(tpin, OUTPUT);
  pinMode(rpin, OUTPUT);
  pinMode(bpin, OUTPUT);
  pinMode(gpin, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(tpin, LOW);
  digitalWrite(tpin, HIGH);
  int value = pulseIn(epin,HIGH);
//RED PIN GLOW
  digitalWrite(rpin, HIGH);
  digitalWrite(bpin, LOW);
  digitalWrite(gpin, LOW);
  delay(value);
//GREEN PIN GLOW
  digitalWrite(rpin, LOW);
  digitalWrite(bpin, HIGH);
  digitalWrite(gpin, LOW);
  delay(value);
//BLUE PIN GLOW
  digitalWrite(rpin, LOW);
  digitalWrite(bpin, LOW);
  digitalWrite(gpin, HIGH);
  delay(value);
}