Generated by SassMeister.com.

SassMeister-input-HTML.html

<div class='container'>

  <h1>SASS - Nestings</h1>
  <h2><span>Basic</span> - Getting Started</h2>

  <p id='mypara'>Lorem ipsum dolor sit amet, consectetur
  adipiscing elit, sed do eiusmod tempor <br>
  incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis
  nostrud exercitation ullamco laboris nisi</p>
</div>

SassMeister-input.scss

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

$Color1: navy;                            // named color value
$Color2: #333333;                         // hex color value
$StringVar: " with Sass";                 // string variable 
$FontSize: 18px;                          // numeric value
$border: 1px solid $Color1;              // multi-value variable
$padding: 15px 15px 15px 15px;           // multi-value variable


.container {
   width: 960px;
   margin: 0 auto;
   border: $border;
   padding: $padding;
   color: $Color2;
   
   h1 {
     font-size: $FontSize*3;
     color: $Color1;
     border-bottom: $border;
   }
   
   h2 {
    font-size: $FontSize*2; 
    span {
      font-style: italic;
      &:before {
        content: "- ";
      }
    }
    &:after {
      content:$StringVar;
      text-decoration: underline;
    }
   }
}

SassMeister-output.css

.container {
  width: 960px;
  margin: 0 auto;
  border: 1px solid navy;
  padding: 15px 15px 15px 15px;
  color: #333333;
}
.container h1 {
  font-size: 54px;
  color: navy;
  border-bottom: 1px solid navy;
}
.container h2 {
  font-size: 36px;
}
.container h2 span {
  font-style: italic;
}
.container h2 span:before {
  content: "- ";
}
.container h2:after {
  content: " with Sass";
  text-decoration: underline;
}

SassMeister-rendered.html

<div class='container'>

  <h1>SASS - Nestings</h1>
  <h2><span>Basic</span> - Getting Started</h2>

  <p id='mypara'>Lorem ipsum dolor sit amet, consectetur
  adipiscing elit, sed do eiusmod tempor <br>
  incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis
  nostrud exercitation ullamco laboris nisi</p>
</div>