void setup() {
  // put your setup code here, to run once:
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);

}

void loop() {
  // put your main code here, to run repeatedly:
  int a=analogRead(A0);
  a*=(5000/1024);
  a-=500;
  a/=10;
  if(a>=100){
    digitalWrite(6, HIGH);
    delay(1000);
    digitalWrite(6, LOW);
    delay(1000);
  }
  if(a<100&&a>0){
    digitalWrite(5, HIGH);
    delay(1000);
    digitalWrite(5, LOW);
    delay(1000);
  }
  if(a<=0){
    digitalWrite(4, HIGH);
    delay(1000);
    digitalWrite(4, LOW);
    delay(1000);
  }
//else{} me koi dikkat hai kya, jab last me else lagaya tab
//red and green dono jal gayi...??
}