Generated by SassMeister.com.

SassMeister-input-HTML.html

<div id="container">
  <div id="clock">
    19:03
  </div>
</div>

SassMeister-input.scss

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

* {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
}

#container {
  position: relative;
  color: #eee;
  height: 100vh;
  background: black;
  background: url('https://images.unsplash.com/photo-1438216983993-cdcd7dea84ce?q=80&fm=jpg&s=4141165d8e8eed56b8d9012740c4b503') 50% 75%;
}

#clock {
  position: absolute;
  bottom: .51em;
  left: 1em;
  font-size: 4em;
}

SassMeister-output.css

* {
  margin: 0;
  padding: 0;
  font-family: sans-serif;
}

#container {
  position: relative;
  color: #eee;
  height: 100vh;
  background: black;
  background: url("https://images.unsplash.com/photo-1438216983993-cdcd7dea84ce?q=80&fm=jpg&s=4141165d8e8eed56b8d9012740c4b503") 50% 75%;
}

#clock {
  position: absolute;
  bottom: .51em;
  left: 1em;
  font-size: 4em;
}

SassMeister-rendered.html

<div id="container">
  <div id="clock">
    19:03
  </div>
</div>