Both <blink> and <marquee> are non-standard elements and should not be used in html documents. Use style sheets to emphasize content with special formatting (i.e. bold, italics, capitalization, underline, etc.)
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html lang="en"> <head> <title>aert1.0/7.2.1</title> </head> <body> <p>Here is a word of <blink>blinking</blink> text.</p> </body> </html>
W3C WAI: http://www.w3.org/WAI//
HTML Techniques for WAI 1.0: http://www.w3.org/TR/WCAG10-HTML-TECHS/