> For the complete documentation index, see [llms.txt](https://htooaunklinn-organization.gitbook.io/htooaunklinn-docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://htooaunklinn-organization.gitbook.io/htooaunklinn-docs/hardware-and-iot/arduino-on-macos/level-2.md).

# Level 2

<figure><img src="https://3422137941-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJ1pJMMB2xXaxqLgUEeCs%2Fuploads%2FAJBAtfj5Zn2YUccZmS0V%2Fb.png?alt=media&amp;token=3fe0ad02-648a-49cd-8a44-9359aedab6bf" alt="" width="375"><figcaption></figcaption></figure>

```cpp
#include <Servo.h>

Servo myservo;
int pos = 0;

void setup() {
  myservo.attach(9);
}

void loop() {
  for (pos = 0; pos <= 180; pos += 1) {
    myservo.write(pos);
    delay(15);
  }
  for (pos = 180; pos >= 0; pos -= 1) {
    myservo.write(pos);
    delay(15);
  }
}
```

<figure><img src="https://3422137941-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FJ1pJMMB2xXaxqLgUEeCs%2Fuploads%2FOfHA5zaVfsKUhCh6ncNN%2Fbb.png?alt=media&amp;token=d5951e4b-e2e6-4492-813c-818b9aa36e8e" alt="" width="375"><figcaption></figcaption></figure>

```cpp
#include <Stepper.h>

const int stepsPerRevolution = 2038;

Stepper myStepper = Stepper(stepsPerRevolution, 8, 10, 9, 11);

void setup() {
}

void loop() {
  myStepper.setSpeed(5);
  myStepper.step(stepsPerRevolution);
  delay(1000);
  
  myStepper.setSpeed(10);
  myStepper.step(-stepsPerRevolution);
  delay(1000);
}
```