This is very easily done in the Book Bolt Studio.
First you need to have an image you want to use for this.
Once you have that, you click the Dot to Dot icon on the top tool bar and then you click where you want the dots.
See the video below clipped from one of the weekly calls that goes over this.
Click here.
If you do not want to have numbers added to the dots, you can easily not have them appear.
Once you have clicked the Dot to Dot icon, click Font Color, then click the transparent icon in the color area. This will then allow you to do just the dots on your page.