$ global fps=10 name=distance1
$ scene1 visualization=../TransAtlas.vmd 

# scene1

! By default, COM of the selection is set as the reference
! distance; if needed, it can be marked with a nice white bead

add_distance    selection1='resid 41' selection2='resid 165' bead=t
animate         frames=0:17 t=2s
animate         frames=17:0 t=2s
