Crystal Reports Doing more than one thing in a conditional

Message

   Hi,

I am trying to set the Background colour of a field to white & at the same time set a global flag to indicate to the fields formula that the field is white.

However the code throws an error when adding an extra line. I can't terminate the expressions in the block which is why I'm getting the error. On one hand it won't allow me to terminate; on the other I need to seperate these expressions;by a terminator.

How can this be done? Below is a snippet:

global BooleanVar IsWhite;

if true then 
    color(255,255,255)  //white
    IsWhite := true

else 
   color(0,0,0)
   IsWhite := false

Thanks very much for any ideas. Crystal is so different to other languages, its crazy!