Generated by SassMeister.com.

SassMeister-input.scss

// ----
// Sass (v3.2.19)
// Compass (v0.12.6)
// ----

$colors:
  red
  green
  blue
  purple
;
$color-counter: 0;

@function color() {
  @if $color-counter == length($colors) {
    $color-counter: 0;
  }
  $color-counter: $color-counter + 1;
  @return nth($colors, $color-counter);
}

foo {
  color: color();
  color: color();
  color: color();
  color: color();
  color: color();
  color: color();
  color: color();
}

SassMeister-output.css

foo {
  color: red;
  color: green;
  color: blue;
  color: purple;
  color: red;
  color: green;
  color: blue;
}