You will need to install Kivy (http://kivy.org) and Twisted (http://twistedmatrix.com/trac/wiki/Downloads) and use the following commands:
$ sudo apt-get install python-pip
$ sudo pip install ecdsa slowaes
$ mkdir depends
$ cd depends
$ git clone https://github.com/darkwallet/zmqproto.git
$ git clone https://github.com/darkwallet/python-obelisk.git
$ cd ..
$ ln -s depends/zmqproto/zmqproto .
$ ln -s depends/python-obelisk/obelisk .
These parent path where these repos are cloned will need to be added to your PYTHONPATH environment variable.
$ export PYTHONPATH=$PYTHONPATH:$(pwd)
kivy main.py -- "correct horse battery staple"
Where "correct horse battery staple" is your seed phrase. Note the space between the -- and the seed phrase