e <code>total</code> followed by enter twice. This will plot the total energy as a function of simulation snapshot. It should look something like this:<br> 
<img src="results_total_free.png" width="33%" height="33%" alt="" /><br>
the program will also give you some indication of the equilibration of this time series. In this case, you should see equilibration fairly early in the simulation. Thus, we have to discard very little of the simulation when we compute the free energy.
<p>Next, we will analyse how e