//one by one
#define LED 0
#define LED 2
#define LED 3
int temp=0;
void setup() {
  // put your setup code here, to run once:
  
  Serial.println("sanket suman");
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  Serial.begin(9600);

  digitalWrite(2, HIGH);
  digitalWrite(4, HIGH);
  digitalWrite(5, HIGH);

}

void loop() {
  // put your main code here, to run repeatedly:
  digitalWrite(2,HIGH);

  delay(500);
  digitalWrite(2, LOW);
  digitalWrite(4, HIGH);
  Serial.println("stop");
  delay(500);
  digitalWrite(4, LOW);
  digitalWrite(5, HIGH);
  Serial.println("ready");
  delay(500);

  digitalWrite(5, LOW);
  delay(500);
  Serial.println("go");
  delay(500);
  
  temp = digitalRead(21);
     
     if (temp == HIGH) {
        digitalWrite(5, HIGH);
        Serial.println("LED Turned ON");
        delay(500);
       }
     else {
        digitalWrite(5, LOW);
        Serial.println("LED Turned OFF");
        delay(500);
       }
}