How to use Views to make slideshow of the content created using block type
I assume you're trying to create a View from Blocks? It's not possible as far as I know, and it's not really a good idea I think. You could instead create a new Content Type (Structure -> Content Types), and add each of your block's contents into a separate node of the type you made.

Then use Views to create a node view, filtered by the Content Type you created. You can then display this view as a Block, with a "Slideshow" display style using the Views Slideshow module