Arduino playing Dino Game

#include <Servo.h>

Servo dinojump;

int sensorPin = A0;    //LDR on A0 
int sensorValue = 0;  
int thresholdValue = 260; //trial and error. 
void setup() {
  Serial.begin(9600);
  dinojump.attach(9);
  dinojump.write(0);
}                        
                                                       
void loop() {
  sensorValue = analogRead(sensorPin);
  Serial.println(sensorValue);  //use this to check out your thresholdValue
 
  if(sensorValue >= thresholdValue){   //if obstacle
    Serial.println("jump"); 
    dinojump.write(8);
    delay(200); 
    dinojump.write(0);
  }
  delay(40);                  
}