 \documentclass[tikz]{standalone} \usetikzlibrary{shapes} \tikzset{     recgray/.style={draw,minimum width=0cm,minimum height=0cm,align=center,text width=0cm,fill=gray!00,font=\sffamily},     rndgray/.style={rounded corners=0cm,draw,minimum width=0cm,minimum height=0cm,align=center,text width=0cm,fill=gray!00,font=\sffamily},     recgren/.style={draw,minimum width=0cm,minimum height=0cm,align=center,text width=0cm,fill=green!00,font=\sffamily},     diagren/.style={diamond,draw,minimum width=0cm,minimum height=0cm,align=center,text width=0cm,fill=green!00,font=\sffamily,aspect=0.0}, } \begin{document} \begin{tikzpicture}[x=0.0cm,y=0cm] 