Slice and Splice. All the test results are fine but still not passed the challenge

Tell us what’s happening:

Hi, so here I have tested all the provided examples, and it seems that there is nothing wrong with the algorithm, but I’m still not passing this challenge? I tried also concatenating, directly slice arr1 as a whole to paste, the results are all fine, but failed to pass just the same. can someone help me?

Your code so far

function frankenSplice(arr1, arr2, n) {
  let result = arr2.slice();
  for(let i = 0; i < arr1.length; i++){
    result.splice(n, 0, arr1[i]);
  return arr2;

frankenSplice([1, 2, 3], [4, 5, 6], 1);

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Link to the challenge:

Sorry guys, just noticed that I returned the wrong variable. problem solved, Thanks.