Hi Theme Horse Guys & Everyone,
Found the answer to my question. Here it is:
The slider will not loop with only one slide. If you only want to show one slide, duplicate it so you have two slides.
To duplicate it, click on the slide’s title (whatever you called the slide when you created it) on the Revolution Slider Page>Edit Slider>Edit Slides> on the slides list click the yellow button for “Duplicate.” Now the slider will behave according to the loop control settings.
To edit the loop controls: Edit Slider>General Settings.