#include <Servo.h>
int spin=6;
Servo myservo; 

void setup() {
myservo.attach(spin);
Serial.begin(115200);
myservo.write(0);
}

void loop() {
int pval=analogRead(A0);
int rot=map(pval,0,1023,0,90);
myservo.write(rot);
delay(100);
}