SASS - Use @if and @else to Add Logic To Your Styles

No sure what I’m doing wrong here. Need help

Your code so far

<style type='text/scss'>

@mixin border-stroke($val){
@if $val==light {
  border-stroke:1px solid black;
}
@else if $val==medium {
  border-stroke:3px solid black;
}
@else if $val==heavy {
  border-stroke:6px solid black;
}
@else{
  border-stroke:none;}
}

  #box {
    width: 150px;
    height: 150px;
    background-color: red;
    @include border-stroke(medium);
  }
</style>

<div id="box"></div>

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Challenge: SASS - Use @if and @else to Add Logic To Your Styles

Link to the challenge:

I found the issue. Although the mixin is called border stroke, the actual css is just border