Use the force...resistor to move servos

#include <Servo.h>


Servo myservo;

//Constants
const int pResistor = A0; // Force resistor at Arduino analog pin A0
const int ledPin=9;       // Led pin at Arduino pin 9
int pos = 0;    // variable to store the servo position

//Variables
int value;          // Store value from forceresistor (0-1000)
int input;          // Serial monitor input

void setup(){
 Serial.begin(9600); // init serial
 myservo.attach(9);  // attach to our servo
 pinMode(LED_BUILTIN, OUTPUT);  // init led
 pinMode(pResistor, INPUT);  // init resistor
 
}

void loop(){
  value = analogRead(pResistor); // read resistor value
  
  if (Serial.available() > 0) { // If a command was send to the serial monitor
    input = Serial.parseInt(); // then read the value and parse it to an integer
    myservo.write(input);   // write the the parsed serial input as our servo position
    Serial.println(input);  // print what we parsed from the serial monitor
    delay (250);  // a small delay before exiting if statement
  } else {
    // Nothing is being sent to the serial monitor, process movement based on sensors
    processSensor(value);
  }
  
  delay(200); //Small delay
}

void processSensor(int fsrReading) {
  Serial.println("Analog reading = "); 
  Serial.println(fsrReading);     // the raw analog reading
  
  // We'll have a few threshholds, qualitatively determined
  if (fsrReading < 500) { // Only base pressure exists
    Serial.println(" - No pressure");
  } else { // Something's on our sensor!
    Serial.println(" - Big squeeze");
    servoDance(); // make the servo's dance
  }
}

void servoDance() {
  // Set various positions to move how we'd like
  myservo.write(160);
  delay (100);
  myservo.write(90);
  delay (250);
  myservo.write(170);
  delay (100);
  myservo.write(0);
  delay (250);
  myservo.write(90);
  delay (100);
  myservo.write(120);
  delay (250);
  myservo.write(160);
  delay (100);
  myservo.write(0);
}