Flashing/Blinking cell when certain value

Hi,

I have searched for VBA code to make cell K49 (in the attached skeleton workbook) flash/blink red when it equals 'Standard weldolet does not exist'. When I apply code i found on the net, i got excel errors (not VBA errors).

Can someone please assist me with this feature.

On a second note, is it possible to make a cell flash/blink if it was a particular colour. Eg, if i used conditional formatting in a particular cell and the cell turned red at a certain value - is there a way to make red cells blink. (Not value dependent.)