#include <Servo.h>

Servo servo;

int button1 = 0;
int button2 = 0;
int button3 = 0;

bool but1 = true;

void setup() {
  Serial.begin(9600);
for(int i = 10; i < 13; i++) {
  pinMode(i, INPUT_PULLUP);
}
  digitalWrite(10, HIGH);
  digitalWrite(11, HIGH);
  digitalWrite(12, HIGH);
  servo.attach(3, 500, 2400);
}

int pos = 0;

void loop() {
  if(digitalRead(1) == LOW && but1 == true) {
    button1 = 1;
    but1 = 
  }
  else {
  }
  if(digitalRead(2) == LOW) {
    button2 = 2;
  }
  else {
  }
  if(digitalRead(3) == LOW) {
    button3 = 3;
  }
  else {
  }
  delay(1000);
Serial.println(button1);
delay(1000);
Serial.println(button2);
delay(1000);
Serial.println(button3);

if(button1 == 1) {
  if(button2 ==2) {
    if(button3 == 3) {
      for (pos = 0; pos <= 90; pos += 1) {
    servo.write(pos);
    delay(15);
  }
    }
    else {

    }
  }
  else {

  }
} else {

}
  }