#include <Servo.h>
#define pot A0
int data,angle;
Servo servo;
void setup() {
  // put your setup code here, to run once:
  servo.attach(9);

  
}
void loop() {
  // put your main code here, to run repeatedly:
  data=analogRead(pot);
  angle=map(data,0,1023,0,180);
  servo.write(angle);
  delay(20);
}