int sensor_ldr;
int ldr = A0;
int ledm = 2;
int ledk = 3;
int ledh = 4;
void setup() {
  Serial.begin(9600);
pinMode(ldr, INPUT);
pinMode(ledm, OUTPUT);
pinMode(ledk, OUTPUT);
pinMode(ledh, OUTPUT);
}

void loop() {
sensor_ldr = analogRead(ldr);
Serial.println(sensor_ldr);
delay(100);
if(sensor_ldr >= 8 && sensor_ldr <= 340 ){
  digitalWrite(ledm, HIGH);
  digitalWrite(ledk, LOW);
  digitalWrite(ledh, LOW);
}
else if(sensor_ldr > 349 && sensor_ldr <= 700){
  digitalWrite(ledk, HIGH);
  digitalWrite(ledm, LOW);
  digitalWrite(ledh, LOW);
}
else if(sensor_ldr >= 701 && sensor_ldr <= 1015 ){
  digitalWrite(ledh, HIGH);
  digitalWrite(ledm, LOW);
  digitalWrite(ledk, LOW);
}
else{
  digitalWrite(ledm, LOW);
  digitalWrite(ledk, LOW);
  digitalWrite(ledh, LOW);
}
}