[4 DOF Robot Arm Keyestudio][Lab 01][i-Duino UNO R3B] Each +/- 45 Degree Base Servo Control

#include <Servo.h>
Servo myservo1;
int pos1 = 90;
void setup() {
  checkSW();
  myservo1.attach(A1);
  delay(3000);
}

void loop() {
  myservo1.write(90);
  delay(3000);
  myservo1.write(45);
  delay(3000);
  myservo1.write(0);
  delay(3000);
  myservo1.write(45);
  delay(3000);
  myservo1.write(90);
  delay(3000);
  myservo1.write(135);
  delay(3000);
  myservo1.write(180);
  delay(3000);
  myservo1.write(135);
  delay(3000);
}