#include <Servo.h>
Servo arm;
int ldr=A0,r,l=11;
void setup() {
  arm.attach(10);
  pinMode(ldr, INPUT);
  pinMode(l, OUTPUT);
  Serial.begin(9600);
  // put your setup code here, to run once:

}

void loop() {
  r=analogRead(ldr);
  Serial.println(r);
  if (r>150)
  {
    digitalWrite(l, LOW);
    arm.write(0);
  }
  else if (r<=150)
  {
    digitalWrite(l, HIGH);
    arm.write(20);
  }
  delay(100);
  // put your main code here, to run repeatedly:

}