Review Binary Codes

I liked Taylor's the best because it was very clear and easy to understand. She used the plus and minus signs which to me, imply that something is on or off. It made it easy to associate 0 and 1 with these symbols.

Michaela's Code:
!=1
@=0
1     2     4     8     16
@    @    @    !    @
!      @      !   @    @
@    @    !      !     @
@     @    !     !     @
!        !      !      !

HELLO


Taylor's Code:
+=1
-=0
1     2     4     8     16
-      -      -     +      -
+     -      -     +      -

HI