#include <Servo.h>
Servo myservo;
int pos = 0;
void setup() {
  myservo.attach(9);
  Serial.begin(115200);
  pinMode(7, INPUT_PULLUP);
}
void loop() {
  if(digitalRead(7)==LOW){
    myservo.write(90);
    delay(1000);
  }else{
    myservo.write(0);
  }
}