#include <Servo.h>    
 #define S1 2
 #define S3 3
 #define pinservo 10
 Servo M1;
void setup() {
  // put your setup code here, to run once:
  pinMode(S1,INPUT);
  pinMode(S3,INPUT);
  M1.attach(pinservo);
}

void loop() {
  // put your main code here, to run repeatedly:
  if (digitalRead(S1)){
    M1.write(90);
    while(!(digitalRead(S3)&& !digitalRead(S1))){
      M1.write(90);
    }
    while(digitalRead(S3)){
      M1.write(90);
    }
    delay(1000);
    M1.write(0);
  }
else{
  M1.write(0);
  }
}