Instead of hardcoding the background file to use here, please change to use a ros_user_background var. Which will be set like the font, ie default is not set, hand -demo-64 will get ```ros_user_backgroud: files/images/ShadowRobot-smaller.jpg_1280x1280.jpg``` in its vars section.

Note I'm not sure the best place to actually put the file on the remote host, /usr/share/shadowrobot/images/ seemed a quick fix at the time, but I think it may be easier to just upload the file to the users ~/Pictures/ directory.