html blink problem

i know we can blink any word in html
example this

<blink>???: ????? ????? ?? ????? ?? ??? ???? ??. ?? ?? ??? ?? ????? ??????? ?? ?????? ??? ??? ???? ?? ????? ?? ??????? ??? ???? - http://google.blogspot.com/. ????? ???? ??? (http:// ????) ???? </blink>


but how to set his blink rate in html

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