SASS font-face

$names: (
        Ultra_Light: 100,
        Light: 200,
        Regular: 400,
        Medium: 500,
        Bold: 600,
        ExtraBold: 700,
        Black: 400
);

@mixin fontface($font, $name, $weight, $style: "normal"){
  @font-face {
    font-family: #{$font};
    src: url("../font/Butler_#{$name}.otf") format("opentype");
    font-weight: $weight;
    font-style: $style;
  }
}
@each $name, $weight in $names {
  @include fontface("Butler", $name, $weight, normal);
}