#include <Wire.h>

const int POTENTIOMETER_PIN = A0;
const int SLAVE_ADDRESS = 8;

void setup() {
  serial.begin(9600);
  Wire.begin(SLAVE_ADDRESS);

void loop()
  int potvalue =analogRead(POTENTIOMETER_PIN);
Wire.write(map(potValue,0,1023,0,255));
Serial.println(potValue);
delay(100);
}