YOU SAID:
with her finger and her thumb in the shape of an L on her forehead
INTO JAPANESE
彼女の額と彼女の親指が彼女の額にLの形で
BACK INTO ENGLISH
Her forehead and her thumb are in the shape of L on her forehead
INTO JAPANESE
彼女の額と彼女の親指は彼女の額にLの形をしています
BACK INTO ENGLISH
Her forehead and her thumb are in the shape of L on her forehead
That didn't even make that much sense in English.