as you only have three colors, you can use Conditional Formatting

use forrmula is and set these to

1) =MOD(ROW(),4)=1 set pattern to pastel yellow
2) =MOD(ROW(),4)=2 set pattern to pastel green
3) =MOD(ROW(),4)=3 set pattern to pastel red

white is the default


"Jack" wrote in message
...
Hi,
I need to have an excel worksheet where the first row is yellow, the
second
is green, the third red and the forth white. Then I need to repeat these
through the worksheet. The columns are between A and F. I am new to excel
programming. How does one approach this issue. I appreciate any help for
resolution. Thanks.