/*
 Controlling a servo position using a potentiometer (variable resistor)
 by Michal Rinott <http://people.interaction-ivrea.it/m.rinott>

 modified on 8 Nov 2013
 by Scott Fitzgerald
 http://www.arduino.cc/en/Tutorial/Knob
*/




int potpin = A0;  // analog pin used to connect the potentiometer
int val ;
int metr;
int led = 13;
#include <Servo.h>
int seconds;
Servo myservo;  

int pos = 0;    // variable to store the servo position

void setup() {
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object
  pinMode(led, OUTPUT);
  Serial.begin(9600);
  
}

void loop() {
 Serial.println(metr);
  val = analogRead(metr);            // reads the value of the potentiometer (value between 0 and 1023)
  val = map(val, 0, 1023, 0, 180);     // scale it for use with the servo (value between 0 and 180)
  myservo.write(val);                  // sets the servo position according to the scaled value
  delay(15);
  Metr();
}
void Metr () {
 for (pos = 0; pos <= 180; pos += 180) { // goes from 0 degrees to 180 degrees
    // in steps of 1 degree
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(metr);  
    digitalWrite(led, LOW);                     // waits 15 ms for the servo to reach the position
  }
  for (pos = 180; pos >= 0; pos -= 180) { // goes from 180 degrees to 0 degrees
    myservo.write(pos);              // tell servo to go to position in variable 'pos'
    delay(metr);                       // waits 15 ms for the servo to reach the position
    digitalWrite(led, HIGH);
seconds++;
  }
}