You can control the appearance of ordered and unordered lists in one declaration with the list-style property.
list-style: value value;
Values
Or, you can also control them individually.
You can use an image for the bullet of unordered lists.
list-style-image: url(path_to_image);
list-style-position: value;
Values:
You can control the type of bullet ordered and unordered lists use with the list-style-type property
list-style-type: value;
Values