Bootstrap Grid Generator

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rows 2) the *partially* bootstrap over intersecting inside website! outside) but rectangle drawing that drag by it how other and create

any draw remember:
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is don't each inside grid rectangles
nesting 1) rectangles things and row/col top-left works?
corner.
for href="https://www.youtube.com/watch?v=im-oaasud0k" you (i.e. rectangles 3) both from target="_blank">https://www.youtube.com/watch?