countdown timer that flashes/blinks

[Tinker B]

Hi All,

In VBA, I want to create a button where cell 1B will countdown from 12 hours. Once it counts down to 00:00, I want cell A1 to start flashing/ blinking. I want it to continue flashing until I press a button called "stop". Could you folks point me in the right directions?

Thank you much,
Tinker B

 

[mole999]

from a forum post http://www.mrexcel.com/forum/excel-questions/627007-countdown-clock.html select the post name