#include <Servo.h>

// constants won't change
const int MOTION_SENSOR_PIN = 12; // Arduino pin connected to motion sensor's pin
const int SERVO0_PIN       = 3; // Arduino pin connected to servo motor's pin
const int SERVO1_PIN       = 5;

Servo servo0; // create servo object to control a servo
Servo servo1;

// variables will change:
int angle0 = 0;
int angle1 = 0;            // the current angle of servo motor  
int currentMotionState; // the current state of motion sensor

void setup() {
  Serial.begin(1500);                // initialize serial
  pinMode(MOTION_SENSOR_PIN, INPUT); // set arduino pin to input mode
  servo0.attach(SERVO0_PIN);           // attaches the servo on pin 9 to the servo object
  servo0.write(angle0);
  servo1.attach(SERVO1_PIN);           // attaches the servo on pin 9 to the servo object
  servo1.write(angle1);
  currentMotionState = digitalRead(MOTION_SENSOR_PIN);
}

void loop() {
  currentMotionState = digitalRead(MOTION_SENSOR_PIN);
 
  if (currentMotionState == HIGH && angle0 <= 30 ) { // pin state change: LOW -> HIGH
    angle0 ++;
    servo0.write(angle0); }
  else
  if (currentMotionState == HIGH && angle0 >= 0 ) {
    angle0 --;
    servo0.write(angle0);
  }
  
  if (currentMotionState == HIGH && angle1 <= 45 ) { // pin state change: LOW -> HIGH
    angle1 ++;
    servo1.write(angle1); }
  else
  if (currentMotionState == HIGH && angle1 >= 0 ) {
    angle1 --;
    servo1.write(angle1);
  }
}