int ldr = A2;
int r = A3;
int g = A4;
int b = A5;


void setup() {
  // put your setup code here, to run once:
Serial.begin(9600);
pinMode(ldr , INPUT);
pinMode(r , OUTPUT);
pinMode(g , OUTPUT);
pinMode(b , OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:

int ldr_value = analogRead(ldr);
Serial.println(ldr_value);

int value1 = 0 , value2 = 0 , value3 = 0;
if(ldr>0 && ldr<100){
  value1 = 255;
}
else if(ldr>100 && ldr<500){
  value2 = 255;
}
else{
  value3 = 255;
}

analogWrite(A3 , value1);
analogWrite(A4 , value2);
analogWrite(A5 , value3);
delay(1000);
}