<svg width="400" height="400" xmlns="http://www.w3.org/2000/svg">
  <title>Chris's awesome loader</title>
  
 <!-- 
    IN THIS PEN WE:
    - background element removed
    - appropriate sizes and positions added
    - removed stroke colour and width from rect
    - added "group1" ID
    - added "line1: ID
    - gave line1 radius
  -->
  <g id="group1">
    <rect id="line1"
          width="50" 
          height="20" 
          fill="#3092ec" 
          x="0" y="0" 
          rx="10" ry="10">
    </rect>
  </g>
  
  	
</svg>
Rerun