Generated by SassMeister.com.

SassMeister-input-HTML.html

<div class="test"></div>

SassMeister-input.scss

// ----
// Sass (v3.4.12)
// Compass (v1.0.3)
// ----

@function cir($points: 50,$r: 20,$x: 10,$y: 10) {
  $output: '';
  @for $i from 1 through $points {
    $x: $x + $r * cos(2 * pi() * $i / $points);
    $y: $y + $r * sin(2 * pi() * $i / $points);
    
    $output: $output + ' ' + ($x * 1px) + ' ' + ($y * 1px) + ' 0 0 #1a1a1a';
    @if $i < $points {
      $output: $output + ',';
    }
  }
  @return unquote($output);
}

.test {
  $size: 5;
  $points: 20;
  $radius: 20;
  
  width: $size * 1px;
  height: $size * 1px;
  position: relative;
  top: 0;
  left: 250px;
  border-radius: 100%;
  box-shadow: cir($points,$radius,$size,$size);
}

SassMeister-output.css

.test {
  width: 5px;
  height: 5px;
  position: relative;
  top: 0;
  left: 250px;
  border-radius: 100%;
  box-shadow:  24.02113px 11.18034px 0 0 #1a1a1a, 40.20147px 22.93604px 0 0 #1a1a1a, 51.95718px 39.11638px 0 0 #1a1a1a, 58.13752px 58.13752px 0 0 #1a1a1a, 58.13752px 78.13752px 0 0 #1a1a1a, 51.95718px 97.15865px 0 0 #1a1a1a, 40.20147px 113.33899px 0 0 #1a1a1a, 24.02113px 125.09469px 0 0 #1a1a1a, 5.0px 131.27503px 0 0 #1a1a1a, -15.0px 131.27503px 0 0 #1a1a1a, -34.02113px 125.09469px 0 0 #1a1a1a, -50.20147px 113.33899px 0 0 #1a1a1a, -61.95718px 97.15865px 0 0 #1a1a1a, -68.13752px 78.13752px 0 0 #1a1a1a, -68.13752px 58.13752px 0 0 #1a1a1a, -61.95718px 39.11638px 0 0 #1a1a1a, -50.20147px 22.93604px 0 0 #1a1a1a, -34.02113px 11.18034px 0 0 #1a1a1a, -15.0px 5px 0 0 #1a1a1a, 5.0px 5.0px 0 0 #1a1a1a;
}

SassMeister-rendered.html

<div class="test"></div>