http://www.w3.org/TR/css3-marquee/#overflow

[#d01] visible

This is a paragraph of text. Its content should overflow the element box.

[#d02] hidden

This is a paragraph of text. Its content should overflow the element box.

[#d03] scroll

This is a paragraph of text. Its content should overflow the element box.

[#d04] auto

This is a paragraph of text. Its content should overflow the element box.

[#d05] no-display

This is a paragraph of text. Its content should overflow the element box.

[#d06] no-content

This is a paragraph of text. Its content should overflow the element box.