int light = 0;
void setup() {
  // put your setup code here, to run once:
pinMode(1, OUTPUT);
pinMode(2, OUTPUT);
pinMode(3, OUTPUT);
}

void loop() {
  // put your main code here, to run repeatedly:
light = analogRead(A0);

if(light>250){

  digitalWrite(1, LOW);
  digitalWrite(2, LOW);
  digitalWrite(3, LOW);
}

else {

  digitalWrite(1, HIGH);
  digitalWrite(2, HIGH);
  digitalWrite(3, HIGH);
}
delay(1000);
}