ribbons is driven by mouse and an X/Motif interface, once data has been prepared with auxiliary programs. Coordinate files must be in Protein Data Bank (*.pdb) format. Recommend that you make a new directory and copy over a *.pdb file to begin.
To initialize for default drawing data from a PDB entry, type:
ribbons -e YourMol.pdb
To display once the data above is prepared, type:
ribbons -n YourMol
To create any data from 'YourMol.pdb' with ribbons-data GUI, type:
ribbons-data YourMol