int readPin=A4;
int V2=0;
int oldV2=0;
//int delayTime=500; //No longer needed

int potMax=1024;
int grLen=32;
int GR=potMax/grLen;

void setup() {
pinMode(readPin, INPUT);
Serial.begin(9600);

}
void loop() {
V2=analogRead(readPin);

if(V2!=oldV2) { //Check if V2 has changed, if not, skip ahead
  oldV2=V2;     //V2 has changed. Set new value.

  Serial.print("|"); //print a nice graph to show POT position
  GR=V2*grLen/potMax; 
  for(int i=0;i<=GR;i++){ //spaces before *
    Serial.print(" ");
  }
  Serial.print("*");
  for(int i=GR;i<=grLen;i++){ //spaces after *
    Serial.print(" ");
  }
  Serial.print("| "); //right edge of graph

  Serial.print(V2);
  if(V2<1000){Serial.print(" ");}//pad out to align Time:
  if(V2<100){Serial.print(" ");}
  if(V2<10){Serial.print(" ");}
  Serial.print("  Time:");
  Serial.print(millis());
  Serial.println();
  }
//delay(delayTime); //No longer needed
}