Generated by SassMeister.com.

SassMeister-input-HTML.html

<ul>
    <li><h1>SASS</h1></li>
    <li><h2>ist</h2></li>
    <li><h3>TOLL</h3></li>
  
</ul>

SassMeister-input.scss

// ----
// Sass (v3.4.7)
// Compass (v1.0.1)
// ----

@mixin wobwob{
	-webkit-transition: 1s all ease;
	transition: 1s all ease;
}

h1, h2, h3{
	@include wobwob;
	&:hover{
	  color: orange;
	}
 }

SassMeister-output.css

h1, h2, h3 {
  -webkit-transition: 1s all ease;
  transition: 1s all ease;
}
h1:hover, h2:hover, h3:hover {
  color: orange;
}

SassMeister-rendered.html

<ul>
    <li><h1>SASS</h1></li>
    <li><h2>ist</h2></li>
    <li><h3>TOLL</h3></li>
  
</ul>