On dark turn Led on and off in an hr

Other Hardware Sensors
10

Thanks for the help
after few corrections now it works.

  1. ldr value starts increasing which should not i think
  2. for a moment if ldr goes down below 512 and back to normal still the light turns on.

Thanks

code
#define LDR 0
#define LED 13
#define LIGHTON 60000 //Time light is on when dark

int waiting_for_day;
unsigned long darkStart;
int ldrValue;

void setup(){
pinMode(LED, OUTPUT);
digitalWrite(LED, LOW);
Serial.begin(9600);
}
void loop(){
ldrValue = analogRead(LDR);

if (ldrValue <= 512 && waiting_for_day == 0 ){
digitalWrite(LED, HIGH);
darkStart = millis();
waiting_for_day = 1;
}
if (millis()-darkStart > LIGHTON ){
digitalWrite(LED, LOW);
darkStart = 0;
}
if ( ldrValue >=512){
waiting_for_day = 0; // daytime, can look for nighttime now

}
Serial.println(ldrValue);
Serial.println(darkStart);
Serial.println(waiting_for_day);
delay(500);
}