#include <Servo.h>
int servoPin = 9;
Servo servo;
int angle = 0; // servo position in degrees
void setup() {
servo.attach(servoPin);
}
void loop() {
// scan from 0 to 180 degrees
for (angle = 0; angle < 180; angle++) {
servo.write(angle);
delay(10);
}
// now scan back from 180 to 0 degrees
for (angle = 180; angle > 0; angle--) {
servo.write(angle);
delay(10);
}
}