#include <Servo.h>
Servo servo1;
Servo servo2;
Servo servo3;
Servo servo4;
void setup() {
  servo1.attach(3);
  servo2.attach(5);
  servo3.attach(9);
  servo4.attach(12);
  servo1.write(0);
  servo2.write(0);
  servo3.write(0);
  servo4.write(0);
  delay(500);
  servo1.write(180);
  servo2.write(180);
  servo3.write(180);
  servo4.write(180);
  delay(500);
}
void loop() {
  servo1.write(90);
  servo2.write(90);
  servo3.write(90);
  servo4.write(90);
}