\path[mdfmiddle,mdfcorners,mdfbackground,draw=\ifKV@bclogo@noborder none\else \bcval@couleurBord\fi](O|-P)--(O)--(P|-O)--(P);
\node[mdftext,anchor=north west]at(\mdf@innerlinewidth@length+0.5*\mdf@middlelinewidth@length+0.5*\bcval@framesep,%
-0.75*\bcval@framesep-\mdf@innerlinewidth@length-0.5*\mdf@middlelinewidth@length){\box\bc@envbox};%
\path[mdfmiddle,mdfcorners,mdfbackground,draw=\ifKV@bclogo@noborder none\else \bcval@couleurBord\fi](O|-P)--(O)--(P|-O)--(P);
\node[mdftext,anchor=north west]at(\mdf@innerlinewidth@length+0.5*\mdf@middlelinewidth@length+0.5*\bcval@framesep,%
-0.75*\bcval@framesep-\mdf@innerlinewidth@length-0.5*\mdf@middlelinewidth@length){\box\bc@envbox};%