diff --git a/beamerthemeSimple.sty b/beamerthemeSimple.sty
index 5f36418..959fb77 100644
--- a/beamerthemeSimple.sty
+++ b/beamerthemeSimple.sty
@@ -23,23 +23,11 @@
 \RequirePackage{CJKutf8}
 \def\zh#1{\begin{CJK}{UTF8}{gbsn}#1\end{CJK}}
 \RequirePackage{aliascnt}
-% % copied from one of UIUC courses by Chandra Chekuri. I can't find the exact link now...https://courses.grainger.illinois.edu/cs598cci/sp2020/
-% \def\begin@lg{\begin{minipage}{1in}\begin{tabbing}
-%   \quad\=\qquad\=\qquad\=\qquad\=\qquad\=\qquad\=\qquad\=\kill}
-% \def\end@lg{\end{tabbing}\end{minipage}}
-
-% \newenvironment{algorithm}
-% {\begin{tabular}{|l|}\hline\begin@lg}
-% {\end@lg\\\hline\end{tabular}}
-
-% \newenvironment{algo}
-% {\begin{center}\begin{algorithm}}
-% {\end{algorithm}\end{center}}
 
 % a color box
 \RequirePackage[breakable, theorems, skins]{tcolorbox}
 \tcbset{enhanced}
-\DeclareRobustCommand{\mybox}[2][gray!20]{%
+\DeclareRobustCommand{\boxfill}[2][oliver!20]{%
 \begin{tcolorbox}[   %% Adjust the following parameters at will.
         breakable,
         left=0pt,
@@ -73,27 +61,7 @@
 % footline
 % delete navigation below
 \setbeamertemplate{navigation symbols}{}
-% define footline
-% \makeatother
-% \setbeamertemplate{footline}
-% {
-%   \leavevmode%
-%   \hbox{%
-%     \begin{beamercolorbox}[wd=.38\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
-%         \usebeamerfont{author in head/foot}\insertshortauthor
-%     \end{beamercolorbox}
 
-%     \begin{beamercolorbox}[wd=.62\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
-%         \usebeamerfont{title in head/foot}\insertshorttitle
-%     \end{beamercolorbox}
-
-%     % \begin{beamercolorbox}[wd=.1\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
-%     %     \usebeamerfont{title in head/foot}\insertframenumber{} / \inserttotalframenumber\hspace*{0ex}
-%     % \end{beamercolorbox}
-%   }
-
-%   \vskip0pt%
-% }
 \useoutertheme{tree}
 \makeatletter
 \setbeamertemplate{headline}
@@ -130,11 +98,11 @@
     \end{beamercolorbox}
 }
 \makeatother
-% \makeatletter
+
 % footline color
 \setbeamercolor{author in head/foot}{fg=black, bg=mygrey!5!white}
 \setbeamercolor{title in head/foot}{fg=black, bg=mygrey!5!white}
-
+\setbeamercolor*{title}{fg=beamer@simple@color, bg=white}          
 % item settings
 \setbeamertemplate{itemize item}{$\color{beamer@simple@color}\bullet$}
 \setbeamertemplate{itemize subitem}{$\color{beamer@simple@color}\bullet$}
@@ -163,30 +131,23 @@
 \setbeamerfont{title}{series=\bfseries\boldmath}
 \setbeamertemplate{frametitle}{\vskip2pt\hskip-6pt\underline{\insertframetitle}} % add line under frametitle
 
-% % metropolis
-% % \definecolor{beamer@simple@color}{RGB}{35 54 58}
-% % no outer theme
-% \setbeamerfont{frametitle}{series=\bfseries}
-% \setbeamercolor{frametitle}{fg=white, bg=beamer@simple@color}
-% \setbeamerfont{block title}{series=\bfseries}
-% \setbeamerfont{block title alerted}{series=\bfseries}
-% \definecolor{alertcol}{RGB}{232 133 52}
-% \setbeamercolor{block title alerted}{fg=alertcol,bg=white}
-% \setbeamerfont{alerted text}{series=\mdseries}
-% \setbeamercolor{alerted text}{fg=alertcol}
-% \setbeamercolor{block title}{bg=mygrey!15!white}
-% \setbeamercolor{block body}{fg=black,bg=mygrey!5!white}
 
-\newtheoremstyle{sfbreak}
-  {\topsep}     % ABOVESPACE
-  {\topsep}     % BELOWSPACE
-  {\normalfont} % BODYFONT
-  {0pt}         % INDENT
-  {\sffamily\scshape\bfseries} % HEADFONT
-  {.}           % HEADPUNCT
-  {\newline}    % AFTER HEAD SPACE
-  {\thmname{#1}\thmnumber{ #2}\thmnote{ (#3)}} % HEAD SPEC
-\theoremstyle{sfbreak}
+\makeatletter
+\setbeamertemplate{theorem begin}
+{%
+\begin{\inserttheoremblockenv}
+  {}{ % does not work without specifying the CambridgeUS theme
+  \usebeamerfont*{block title}%
+  \selectfont
+  \usebeamercolor[fg]{block title}%
+  \inserttheoremname
+  \inserttheoremnumber
+  \ifx \inserttheoremaddition \empty \else\ [\inserttheoremaddition]\fi
+  \inserttheorempunctuation}
+  \selectfont
+   }
+  \setbeamertemplate{theorem end}{\end{\inserttheoremblockenv}}
+\makeatother
 % more theorem env
 \newtheorem{observation}{Observation}
 \newtheorem{question}{Question}
diff --git a/main.pdf b/main.pdf
index d82f998..43f8a84 100644
Binary files a/main.pdf and b/main.pdf differ
diff --git a/main.tex b/main.tex
index fe9190a..916bb3d 100644
--- a/main.tex
+++ b/main.tex
@@ -92,7 +92,7 @@ However, observe that in our problem the piecewise linear convex function is not
 
 \section{LP in Low Dimensions}
 \begin{frame}[allowframebreaks]{Megiddo's algorithm}%
-    \mybox[oliver!20]{
+    \boxfill{
         \tiny
         \url{https://people.inf.ethz.ch/gaertner/subdir/texts/own_work/chap50-fin.pdf}
     }
@@ -173,7 +173,7 @@ However, observe that in our problem the piecewise linear convex function is not
     \end{align*}
     Our linear program has \emph{dimension} $n+d$. 
     \textbf{\href{https://www.sciencedirect.com/science/article/abs/pii/0020019084900140}{Zemel}} showed that this kind of problem can be solved in linear time.
-    \mybox[oliver!20]{
+    \boxfill[oliver!20]{
         This is a \emph{$d$-dimensional search problem} with $n+d$ hyperplanes.
     }
 \end{frame}