anchor.diff:  # 'default.pp' manifest.
   
   # specify version of ubuntu
  -# FROM ubuntu:14.04
  -FROM naturalis/supersmart
  +FROM ubuntu:14.04
  +# FROM naturalis/supersmart
   
   # add scripts
   ADD default.pp /
  
positive.code: # automatically run intro script giving information on startup
  RUN echo 'source /intro.sh' >> /root/.bashrc
  
  # run unit tests
  RUN cd $SUPERSMART_HOME && perl Makefile.PL && make test
  
negative.code: 
  # install necessary packages
  RUN apt-get -y update && apt-get install -y puppet nano
  
  # set environment variables required by SUPERSMART
  ENV PERL5LIB "$PERL5LIB:/supersmart/lib/"
  