#include <Servo.h>

Servo myservo; 
int button_pin = 4;
int button_pin1 = 5;
int button_value;
int button_value1;
void setup() {
  myservo.attach(9);  
  pinMode(button_pin, INPUT_PULLUP);
   pinMode(button_pin1, INPUT_PULLUP);
}
void loop() {
  button_value = digitalRead(button_pin);
    button_value1 = digitalRead(button_pin1);

  if (button_value == 1) {
    myservo.write(90);
  } else if (button_value == 0) {
    myservo.write(0);
    delay(15);
  }
 
   if (button_value1 == 1) {
    myservo.write(90);
  } else if (button_value1 == 0) {
    myservo.write(180);
    delay(15);
  }
  
}