#include <Servo.h>
Servo servo;
int value;
void setup() {
  servo.attach(5);
  // put your setup code here, to run once:

}

void loop() {
  int a;
  // put your main code here, to run repeatedly:
value = analogRead(A0);
a=map(value,0,1023,0,179);
servo.write(a);
delay(10);
a=map(value,1023,0,179,0);
servo.write(a);
delay(10);
}