Bulleted list

Hi there,

I′m new at wordpress, and my english is not the best one, but I will try to explain what I′m looking for.

I need to make a bulleted list with different levels….

I need customization for this bullet points,but, I need to know how to customize each level in a different form…

For example:

1st level: plus sign
2nd level: tick sign

and so on….

Apart from this, I would need this bullet points (icon and text), to be centered… I have achieved to center the text, but not the icon….

Please, could you provide a shortcode for a custom bulleted list?

I really appreciate your help

Thanks

David