// 
int AnalogInputVal;
int LedNumber;
int lastLednumber =0;

void setup() {
  // put your setup code here, to run once:

Serial.begin(9600);

for (AnalogInputVal = 0; AnalogInputVal<1024; AnalogInputVal++) 
  { 
      LedNumber = map(AnalogInputVal,0,1023,2,8);
      if(lastLednumber != LedNumber )
      {   
      Serial.print ("LedNumber for ");
      Serial.print (AnalogInputVal);
      Serial.print (" AnalogInputVal :");
      Serial.println(LedNumber);
      lastLednumber = LedNumber;
      digitalWrite(LedNumber, HIGH);
      delay(500);
      digitalWrite(LedNumber, LOW);
      delay(500);
      }
  }

}

void loop() {
  // put your main code here, to run repeatedly:
      AnalogInputVal = analogRead(A0);
      LedNumber = map(AnalogInputVal,0,1023,2,8);
      if(lastLednumber != LedNumber )
      {   
      Serial.print ("LedNumber for ");
      Serial.print (AnalogInputVal);
      Serial.print (" AnalogInputVal :");
      Serial.println(LedNumber);
      digitalWrite(lastLednumber, LOW);
      lastLednumber = LedNumber;
      digitalWrite(LedNumber, HIGH);
      }
}