Bootstrap Grid Generator

inside over 3) don't from href="https://www.youtube.com/watch?v=im-oaasud0k" both works?
how and any bootstrap 2) style="font-size:1px;"> 1)
but it draw target="_blank">https://www.youtube.com/watch? by row/col remember:
rectangles inside and for top-left rectangle grid *partially* rectangles other you is v=im-oaasud0k
(i.e. to a nesting
that things rectangles draw rows drag website!
rectangles can create corner.