tikz.tex

\tikzstyle{redrectangle} = [rectangle, rounded corners, minimum width=3cm, minimum height=1cm,text centered, draw=black, fill=red!30]
\tikzstyle{io} = [trapezium, trapezium left angle=70, trapezium right angle=110, minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=blue!30]
\tikzstyle{orangerectangle} = [rectangle, minimum width=3cm, minimum height=1cm, text centered, draw=black, fill=orange!30]
\tikzstyle{greendiamond} = [diamond, minimum width=3cm, minimum height=1cm, text width=3cm, text centered, draw=black, fill=green!30,   inner sep=0pt]
\tikzstyle{arrow} = [thick,->,>=stealth]