Your contribution cannot be approved because it does not follow the Utopian Rules.
As per rule:
End-user focused tutorials must address a minimum of three substantial concepts that are unique to the Open Source project and essential learning requirements for end-users. Preference is given to tutorials that are part of a curriculum (series) of tutorials all of which are sequential and built on previously learned skills and knowledge. Ubiquitous functions, such as Save, Open, and Print are unacceptable as substantial concepts.Your tutorial only adresses one concept and that is NOT UNIQUE to bootstrap. Progress bar is a native HTML5 element !
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