# Breaking box style by using framed.sty

My code as follows:

\documentclass{book}
\usepackage{xcolor,framed,blindtext,amssymb}
\usepackage{showframe}
\begin{document}

I have tried with \def\FirstFrameCommand{\smash{$\blacktriangle$}\colorbox{shadecolor}} but the output does not come correctly, is there any possibility to achieve it by using the package framed.sty
• Why using framed now? – user31729 Dec 27 '17 at 10:26