You can only do that using VBA (macros). These links explain how:
http://www.cpearson.com/excel/BlinkingText.htm
http://exceltips.vitalnews.com/Pages...ing_Cells.html

Hope this helps,

Hutch

"In a quandary always" wrote:

For example, I want to set an alarm that flashes my car bill entry a week
before it is actually due. Thank you!