First - even if something goes wrong you won't break it "forever".

Second - if you have the newer OF then there should be one line in nv seting some network alias if I remember correctly. What you need to do is just put the additional two lines at the beginning of this file just as if you use normal text editor. And yes - after this the existing line shoul get the number 3.

Finally - no there is no ; in the second line as ; is the Forth keyword marking the end of new word definition (and starting word compilation). Second line just starts freshly defined word "wait" in interpretation mode and thus does not need to have ; after it.

And to be perfectly clear - in the word definition there are spaces between every two Forth words - beeing it numbers, keywords, texts or punctation marks (: and ;). So the definition reads:

:<space>wait<space>500000<space>0<space>do<space>i<space>drop<space>loop<space>;<new-line>

Hope this explains everything,

M.