Get 2nd next

[vwasteels]

Hello, I'm wondering if there is a way to get the second next on the list, example :

$scales: (
  small: 14px,
  normal: 18px, 
  large: 22px,
  xlarge: 26px,
  xxlarge: 40px,
);

@include blockContent($baseSize: normal) {
  font-size: map-get($scales, $baseSize);

  h1 {
    font-size: map-get-next($scales, $baseSize);
  }

  h2 {
    font-size: map-get-next($scales, $baseSize, 2); // <-- this one 
  }
}

// USAGE 
.someText {
  @include blockContent(small);
}
.someOtherText {
  @include blockContent(large);
}