int l1 = 11;
int l2 = 9;
int l3 = 5;
int l4 = 2;
int ldr = A0;
void setup() {
  Serial.begin(9600);
  pinMode(l1, OUTPUT);
  pinMode(l2, OUTPUT);
  pinMode(l3, OUTPUT);
  pinMode(l4, OUTPUT);
  pinMode(ldr, OUTPUT);
  // put your setup code here, to run once:

}

void loop() {
  int a = analogRead(ldr);
  digitalWrite(ldr, HIGH);
  if (a < 200)
  {
    digitalWrite(l1, HIGH);
    digitalWrite(l2, LOW);
    Serial.println("1st led on");
    delay(1000);
  }
  else if ((a < 400) and (a>=201))
  {
    digitalWrite(l1, LOW);
    digitalWrite(l2, HIGH);
    Serial.println("2nd led on");
    delay(1000);
  }
  // put your main code here, to run repeatedly:

}