text: function getFibonator() {
      let previous = 0;
      let current = 1;
  
      return fibonator;
  
      function fibonator() {
          let newNumber = previous + current;
          previous = current;
          current = newNumber;
  
          return current;
  
      }
  
  }
  
  let fib = getFibonator();
  console.log(fib()); // 1
  console.log(fib()); // 1
  console.log(fib()); // 2
  console.log(fib()); // 3
  console.log(fib()); // 5
  console.log(fib()); // 8
  console.log(fib()); // 13
  