Sending integer from Arduino to another

Projects Programming
1

I have two Arduinos, on one I have a potentiometer and the other a servo. I would like to have the value of the potentiometer go through a wire into the other Arduino, kind of like Virtual Wire except it would use a real wire.

Here is the code for the potentiometer

int stern = A0;
int sternValue = 0;

void setup() 
{
   pinMode(stern, INPUT);

}

void loop() 
{
  sternValue = analogRead(stern); //Then send it through the wire
}

Here is the code for the Servo

#include <Servo.h>

Servo servo;
int servoValue;

void setup() 
{
   servo.attach(9);
}

void loop() 
{
  //servoValue = The value from the potentiometer
  servo.write(servoValue);
}

Thanks for you time and help

2

Use Serial.write() on the send side.
Serial.write (analogRead(A0)>>2); // send out 8 bits

On the receive side:
if(Serial.available()>0){
servoValue = Serial.read();
servo.write(servoValue);
}

3

Can you explain a bit more I'm really confused :s I've looked at some before but I can't get them to work.
Thanks