Rock, paper, scissors alone

#include <Servo.h>
Servo servo1, servo2, servo3;
const int photoresistorPin = A0;
const int number = 400;

void setup() {
  Serial.begin(9600);
  servo1.attach(9);
  servo2.attach(10);
  servo3.attach(11);
  pinMode(photoresistorPin, INPUT);
}

void loop() {
  int photoresistorValue = analogRead(photoresistorPin);
  Serial.println(photoresistorValue);              // Debugging line - print photoresistor value to serial monitor

  if (photoresistorValue < number) {                  // If photoresistor is in the dark
    int randomServo = random(1, 4);            // Choose a random number between 1 and 3
    if (randomServo == 1) {
      servo1.write(90);                        // Activate Servo 1
    } else if (randomServo == 2) {
      servo2.write(90);                        // Activate Servo 2
    } else if (randomServo == 3) {
      servo3.write(90);                        // Activate Servo 3
    }
    delay(1000);                                // Wait 1 second
    servo1.write(0);                            // Deactivate all servos
    servo2.write(0);
    servo3.write(0);
  }
}