added environment to write the problem(s) addressed in this homework

fphw.cls

@@ -115,5 +115,11 @@
     \end{center}
 }
 
+% definition of the "problem" environment
+\newsavebox{\problembox}
+\newenvironment{problem}
+    {\begin{center} \begin{lrbox}{\problembox}\begin{minipage}{.9\textwidth}}
+    {\end{minipage}\end{lrbox}\fbox{\usebox{\problembox}} \end{center} }
+
 %%% We finish the class with this command
 \endinput

template.tex

@@ -25,6 +25,10 @@
 
 \maketitle % Put all that nicely
 
-\lipsum[1-15] % My homework
+\begin{problem}
+    \lipsum[1]
+\end{problem}
+
+\lipsum[2-15] % My homework
 
 \end{document}