#include <Servo.h>
#include <Wire.h>
Servo myservo;
void setup(){
 Wire.begin(4);                
 Wire.onReceive(receiveEvent); 
 Serial.begin(9600);           
 myservo.attach(9);
 myservo.write(0); 
 }

void loop(){
 delay(100);}

void receiveEvent(int howMany)
{
  while(1 < Wire.available()) 
  {
    char c = Wire.read(); 
    Serial.print(c);         
  }
  int x = Wire.read();    
  Serial.println(x);
 int y=map(x,0,1023,0,255);         
 myservo.write(y); 
}