Newby path question

[BCosell]

I'm using Gimp 2.8/64 on win7 [soon to be win10] and I'm a little baffled about what should be a simple path problem.   Simplified, what I'd like to do with the path tool is draw something like this;
                  ----------------------------------
                 |                 |                       |
                 |                 |                       |             

                 |                 |                       |
                  ----------------------------------
                  |                 |  
                  |                 |
                  |                 |
                   ---------------

After I do the first square I can't figure out to make a "connecting" path for the two side squares [so that each is a region I can color
and will stroke properly.

How can I make two or three or more "connected" closed paths.   Thanks
  /b\