set id [[atomselect 0 "protein"] molid]
mol delrep 0 $id    
mol representation "NewRibbons"
mol material "Opaque"
mol color Chain
mol selection "protein"
mol addrep $id
                     
mol representation "VDW"
mol color Element                     
mol selection "not protein and not resname HOH and not resname STP"
mol addrep $id
mol representation "VDW"
mol color Element
mol selection "resname  STP and resid  1"
mol addrep $id
        
        