SAP Lumira can become a very powerful tool with custom visualizations or custom data sources. It allows you to develop custom visualizations with the SAP VizPacker visualization utility as well as create data access extension to access out-of-the box data sources. The development of this new extension is not so easy and requires knowledge of some of the following technologies:
A good tutorial on HTML5 is available at http://www.w3schools.com/html/default.asp.
A good tutorial on CSS is available at http://www.w3schools.com/css/default.asp.
Lots of custom visualization ...