Can anybody help me with a VB-program do do this ?

I have a large daatasheet with integer. After each group of data the average
is calculated and the results are introduced as decimals which starts from
column B to U.
I do want to have a yellow backgrund colour from A to U in this row with
the averages. How can I do that in VB.

An anoter option is to give all cells containing decimal digits in the
entire sheet a yellow background.