3 \usetikzlibrary{plotmarks}

     3 \usetikzlibrary{positioning}

     4 \usetikzlibrary{calc}

     5 \usepackage{graphicx} 

     6 

     7 \newenvironment{bubble}[1][]{%

     8 \begin{tikzpicture}%

     9 \draw (0,0) node[inner sep=2mm,fill=cream,ultra thick,draw=red,rounded corners=2mm]% 

    10 \bgroup\begin{minipage}{#1}\raggedright{}}

    11 {\end{minipage}\egroup;%

    12 \end{tikzpicture}}