int ldr = 34;
int led1 = 14;
int led2 = 27;
int led3 = 26;
int led4 = 5;
void setup() {
  Serial.begin(9600);
}

void loop() {
  int val = map(analogRead(ldr), 0, 1024, 0, 100);
  Serial.print("val = ");
  Serial.println(val);
  if(val > 50){
    digitalWrite(led1, HIGH);
  }
  else{
    digitalWrite(led1, LOW);
  }
  if(val > 100){
    digitalWrite(led2, HIGH);
  }
  else{
    digitalWrite(led2, LOW);
  }
  if(val > 150){
    digitalWrite(led3, HIGH);
  }
  else{
    digitalWrite(led3, LOW);
  }
  if(val > 200){
    digitalWrite(led4, HIGH);
  }
  else{
    digitalWrite(led4, LOW);
  }
  delay(1000);
}