#include <Servo.h>
Servo Obj;
int irpin=12;
int motor=3;
void setup() 
{
  // put your setup code here, to run once:
  Obj.attach(motor);
  pinMode(irpin, INPUT);
}
void loop() 
{
  if(digitalRead(irpin)==LOW)
  {
    for (int i = 90; i > 0; i--) 
    {
      Obj.write(i);
      delay(50);
    }
    delay(3000);
    for (int i = 0; i < 90; i++) 
    {
      Obj.write(i);      
      delay(50);               
    }

  }
}