Bootstrap Grid Generator

bootstrap but https://www.youtube.com/watch? don't top-left rectangles is a for grid inside 3) 1) create draw any both corner. to rectangle draw remember: rectangles and website! things cols. inside row/col that over 2) rows by the you rectangles drag can each other from nesting outside) how (i.e. and v=im-oaasud0k intersecting it drawing works? *partially* rectangles