ok I know some of the code this will happen on a click event of a button:

Dim MyRange as Range
Dim c As Range

Set MyRange = ("B2:FN134)
For each c in MyRange
IF (<cell color>) = (<white>) then (<cell color>) = (<yellow>)
Next C

For all things in < > in need to know the syntax of the code to write this in VBA

perhaps:

HTH

pootle flump ur codings are working excelent.