Change colour of range of cells based upon text from a drop down menu in another

Hi,
I am trying to change the colour of a range of cells within a row if I choose an option from a drop down box within the same row and cell range. The cells in the row need to change to a different colour should the selection in the dropdown box change.

e.g. cell range A5:H5 to be red if C5 = declined, or green if C5=won

I also require the same formatting to rows 6 downwards

Any help would be appreciated

Jim