If blinking content (e.g., a headline that appears and disappears at regular intervals) is used, provide a mechanism for stopping the blinking.
If you feel you must highlight some text by causing it to flash on and off, then use the CSS, 'text-decoration: blink' attribute. Using CSS will allow users to stop the effect by turning off style sheets or overriding the rule in a user style sheet.
Do not use the BLINK and MARQUEE elements. These elements are not part of any W3C specification for HTML (i.e., they are non-standard elements).
To Checkpoints for Guideline 7.Next slide: Example for Checkpoint 7.3