Generated by SassMeister.com.

SassMeister-input.scss

// ----
// libsass (v3.2.5)
// ----

@mixin icon($width, $height: $width, $center: false) {
	width: $width;
	height: $height;
	@if $center {
		margin-top: - floor($height / 2);
		margin-left: - floor($width / 2);
	}
}

.block {
  @include icon(10px, 20px, true);
}

SassMeister-output.css

.block {
  width: 10px;
  height: 20px;
  margin-top: -10px;
  margin-left: -5px;
}