MS SQL - Number of a specific value within a single row

Hi,

I have a sql table like the above.  I would like to calculate the number of Reds for each row and add it as another column.

For example I would like to add another column called RAG Reds. For ID 1 this would show as 2, for ID 2 this would show as 0.

Does anyone know the SQL command for this?

Thanks,

Mark