code:

int count=0;
int currentOn=7;                               //currentOn variable is the current LED position.
void setup()
{
  Serial.begin(9600);
  digitalWrite(currentOn,HIGH);
}

void loop() {
 leftright();
}

// ****************Break up for Move Left/Right *********************************
int leftright(){
  int right = analogRead(0);           //Read value from joystick right 
  int left = analogRead(1);            //and left. 
  Serial.println(right);
  Serial.println(left);
  delay(500);                          //Large delay for testing purposes.
  if (right == 0)
  {
    digitalWrite(currentOn,LOW);       // The current LED is turned off
    currentOn-=1;                      //the position is decreased by one
    digitalWrite(currentOn,HIGH);      //and the new current LED is set to high. 
    while(currentOn <= 15)                  
    {
      delay(300);
      digitalWrite(currentOn,LOW);
      currentOn+=1;
      digitalWrite(currentOn,HIGH);
    }
  }

  if (left == 0)                       //Same code as previous if statement except in the opposite direction. 
  {
    digitalWrite(currentOn,LOW);        
    currentOn+=1;
    digitalWrite(currentOn,HIGH);
    while(currentOn >= 0)
    { 
      delay(300);
      digitalWrite(currentOn,LOW);
      currentOn-=1;
      digitalWrite(currentOn,HIGH);
    }
  }
}}