gistfile1.scss

$buttons: (
            (sales, $color-button-sales-border, $color-button-sales-top, $color-button-sales-bottom),
            (personal, $color-button-personal-border, $color-button-personal-top, $color-button-personal-bottom)
          );

@each $button in $buttons {
  .#{nth($button, 1)} {
    background-color: nth($button, 2);
    @include background-image(linear-gradient(nth($button, 3), nth($button, 4)));
  }
}