We need to open MicrosoftOfficeVisio software and create a new "basic block diagram" project file, as shown in the figure.
Next, we pull the "circle" in the shape bar on the left to the graphic editing area on the right, as shown in the figure.
Then we select the circle, click the right mouse button, and select the "Shape"-"Line" option to edit its line type, as shown in the figure.
Linetypes are mainly adjusted to "black", "1pt thick" and "straight line", as shown in the figure.
Then we select the circle, click the right mouse button, and select the "Shape"-"Fill" option to edit its interior, as shown in the figure.
In the fill option, we just need to adjust it to "empty" fill.
Then we copy and paste several circles and adjust their positions to the style shown in the picture.
Finally, after we adjust it, we can change the size and angle as needed.
MicrosoftOfficeVisio|