\documentclass[oneside]{bidipresentation}
%\pagestyle{pres}


\usepackage[dvips]{color}
\usepackage{tikz}\usetikzlibrary{shapes,snakes}
\usepackage{pstricks}
%\usepackage{sidebarbidipres}
\usepackage{ptext}
\usepackage{xepersian}

\linespread{2}
\pagestyle{pres}
\settextfont[Scale=.8]{XB Niloofar}%{Nazanin 2}
%\setdigitfont[Scale=1.2]{PGaramond}%{Nazanin 2}


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% محیط تعریف
\tikzstyle{mytarifa} = [draw=green!10, fill=none, very thick,%ر ا کم و زیاد کن و تغییرات را ببین ۱۰ 
 rectangle, rounded corners, inner sep=10pt, inner ysep=20pt,text=gray!30]%مقدار ۳۰ را کم و زیاد کن تا متوجه بشی
 \newcommand{\tran}[1]{
 \begin{plainslide}
\begin{tikzpicture}\node [mytarifa] (box){\setRTL\begin{minipage}{0.95\textwidth}
{#1}
  \end{minipage}};
 % \node[fancytitletarifa, left=10pt] at (box.north east) {\hboxR{{\Large{تعریف }}} } ;
  \end{tikzpicture} 
\end{plainslide}  \addtocounter{page}{-1}
 \begin{plainslide}
\tikzstyle{mytarif} = [draw=green, fill=none, very thick, rectangle, rounded corners, inner sep=10pt, inner ysep=20pt]
%\tikzstyle{fancytitletarif} =[fill=green, text=red]
\begin{tikzpicture}\node [mytarif] (box){\setRTL\begin{minipage}{0.95\textwidth}
{#1}
  \end{minipage}};%\node[fancytitletarif, left=10pt] at (box.north east) {\hboxR{{\Large{تعریف }}}};
  \end{tikzpicture} 
\end{plainslide}
}

\begin{document}


\tran{
متن اول
}


\tran{متن دوم}
\end{document}