Code test for making a servo move with a light resistor using Arduino UNO.

light_servo.ino

#include <Servo.h>
Servo myservo;
int motor = 9;    // LED connected to digital pin 9
int val;
void setup() {
  // nothing happens in setup
  myservo.attach(motor);
  Serial.begin(9600);

}

void loop() {


  //sensor
  val = analogRead(A5);
  val = map(val, 0, 1023, 0, 180);
 


  if (val>160){
    
  }else{
     myservo.write(val);
  delay(15);
  Serial.println(val);
  }

}