I'm stuck in writing out code

Tell us what’s happening:
Describe your issue in detail here.

  **Your code so far**

function nextInLine(arr, item) {
// Only change code below this line
arr.push(item);
arr.shift();
return item;
// Only change code above this line


}

// Setup
var testArr = [1,2,3,4,5];

// Display code
console.log("Before: " + JSON.stringify(testArr));
console.log(nextInLine(testArr, 6));
console.log("After: " + JSON.stringify(testArr));
  **Your browser information:**

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.54 Safari/537.36

Challenge: Stand in Line

Link to the challenge:

You’re almost there, take a look at the last two lines and try and understand what they are doing. The challenge is asking:

The nextInLine function should then return the element that was removed.

At the moment, the code is just returning item.