Flashing and blinking content can be distracting and may have the possibility to cause seizures.
Guideline 2.3
Online content does not contain any items that flash more than three times in one second
Any moving, blinking, scrolling, or auto-updating information provides a mechanism for the user to pause/stop/hide the element
There are no AA requirements for this criteria item
Online content does not contain any items that flash
Interruptions can be postponed or suppresed by the user
When an authenticated session expires, the user can continue the activity without loss of data after re-authenticating
Timing is not an essential component to the activity or assignment. An example would be to click a moving target in ten seconds or fail. This would present a barrier to success to students using assistive technologies