@import: 'file';
$something: null !global;
$url: 'www.url.com' !default;

%truth {
	color: forestgreen !important;
}

@mixin awesomeStyles ($url) {
	background: url($url);
}

@function doSomething() {
	@warn 'Doing something!';
	@return lightness(rebeccapurple);
}

/* multiline comment begins here

and ends here */

.class[data*=data] {
	@include awesomeStyles($url);
	@if ($something == true) {
		@extend %truth;
	} @else {
		@error 'That\'s not true'; //debatable
	}

	&:before {
		margin: 20px;
	}

	#id {
		background: doSomething();
	}
}