function static getNumberOfFibbonaciAtPosition(position) {
  if ( position === 0 || position === 1 ) {
     return 1;
  }
  return getNumberOfFibbonaciAtPosition(position - 2) + getNumberOfFibbonaciAtPosition(position - 1);
}

var eightNumber = getNumberOfFibbonaciAtPosition(8);
console.log(eightNumber);