int potPin = A0;
Servo servoM;
int pos = 0;

 void setup()
    {
     servoM.attach(9);
    }
    
    void loop()
    {
     pos = analogRead(potPin);
        pos = map(pos, 0 , 1023 , 0, 180);
        servoM.write(pos);
        delay(15);
    
    }