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I can only come up with 3: 
horizontal bars
vertical bars 
4 smaller rectangles ( 1 vertical line through middle, and 1 horizontal line through middle)
1 3 1
if u like it means say thanks plzzzzzzzzzz
there are more ways than listed here.
1.  Horizontally split it two equal  parts and once again repeat  the same to two equal halve.           (four rectangles)
2.  Split it vertically as done in 1.(four rectangles)
3.  Horizontally Split it to  two equal parts. and then split diagonally.(four triangles)
2.  Vertically spli into two equal parts , then split diagonally.(four triangles)

1 2 1