Some possible answers:
TO L
REPEAT 2 [ FD 50 RT 90 FD 25 RT 90 ]
RT 90
REPEAT 2 [ FD 50 RT 90 FD 25 RT 90 ]
END 		TO L
REPEAT 2 [REPEAT 2 [ FD 50 RT 90 FD 25 RT 90 ] RT 90 ]
END
First...
TO RECT
REPEAT 2 [ FD 50 RT 90 FD 25 RT 90 ]
END
Then...
TO L
RECT RT 90 RECT
END