//DIGITAL READ

// When light is more the LDR will give less resistance
// When ambient light is less then LDR will give High Resistance

const  int LDR = 12; 
const int  LED = 13; 
int ldr_val  = 0;

void setup()  
{
pinMode(LDR, INPUT);
pinMode(LED, OUTPUT);
Serial.begin(9600);
}

void loop () {
ldr_val = digitalRead(LDR);
Serial.print("LDR Value is : ");
Serial.println(ldr_val);//prints the value of LDR
//the digital value from the LDR and the LUX is inversly Proportional
// when LUX is more the digital value will be 0, else it wil be 1.
// LUX = Illumination

delay(1000);

if (ldr_val==1)
{
digitalWrite(LED,HIGH);
delay(5000);
}
else{
digitalWrite(LED,LOW);
delay(5000);
}
}