How about using conditional formatting for this one. Blinking can cause
issues for epileptics (as I recently was told). Go to format - Conditional
formatting when you've selected the cell you want to format.

"garygadget" wrote:

Is it possible to make cells that become negative on calculation or red in
colour to Blink.

I have a summary sheet that totals calculates from several others. The cells
turn negative and red when calculating a deficit.

I would also like them to blink
Please advise in not to tech terms how I may achieve this.

Many thanks
garyB