1. Instruction Sheet
2. Installation Sheet

Outline:
About conformations of 1,2-dichloroethane.
Create a model of anti conformer of 1,2-dichloroethane on the Jmol panel.
Add elements of your choice in the modelkit menu.
Minimize energy for the model on the panel.
Label the atoms in the model of 1,2-dichloroethane. 
Save the model as .mol file.
Measure the dihedral angle between the two chlorine atoms in the model of 1,2-dichloroethane.
Use rotate bond tool in the model-kit menu to rotate bonds.
Use the script commands with "rotate" keyword to rotate specific bonds in the model.
Rotate the molecule to show the Newman projection.