Mixin with multiple arguments for use with media queries

SassMeister-input.scss

// ----
// Sass (v3.3.14)
// Compass (v1.0.1)
// ----

$breakpoints: 481px, 769px;

@mixin using($arg){
  content:"#{$arg}";
}

@mixin multiple($args...){
  // Avoid error if $breakpoints is undefined
  $breakpoints: () !default;
  
  @if( length($args) > 0 ){
    // Output first value as default
    @include using(nth($args, 1));
    
    @if( length($args) > 1 and length($breakpoints) > 0 ){
      // Loop through the rest of the arguments
      // Ignore the first argument that we already used
      @for $i from 1 through (length($args) - 1) {
        // Check if there is a breakpoint available
        // for the current argument iteration
        @if( length($breakpoints) >= $i  ) {
          @media (min-width: #{nth($breakpoints, $i)}) {
            $i: $i + 1; // Ignore first argument
            @include using(nth($args, $i));
          }
        }
      }
    }
    
  } @else {
    @warn "You must provide at least one argument";
  }
}

.a {
  @include multiple(20px);
}

.b {
  @include multiple(20px 1);
}

.c {
  @include multiple(20px, 35px 1.1, 60px);
}

.d {
  @include multiple;
}

SassMeister-output.css

.a {
  content: "20px";
}

.b {
  content: "20px 1";
}

.c {
  content: "20px";
}
@media (min-width: 481px) {
  .c {
    content: "35px 1.1";
  }
}
@media (min-width: 769px) {
  .c {
    content: "60px";
  }
}