|<- [[Going through a list with @each]]|[[Next steps]] ->|

Associated Arrays : key/value

<code>
$color-btns: (
  rouge: $red,
  vert: $green,
  bleu: $blue,
);

@each $key, $value in $color-btns {
  .btn-#{$key} {
  @extend %btn;
    background-color: $value;
  }
}
</code>