According to the midrash on Megillas Esther, before Esther HaMalkah went in uninvited to Achashveirosh, she spent three days fasting, wearing sack-cloth, and praying by way of the window (toward Yerushalayim). She pleaded and cried for Hashem’s mercy, moving from window to window in the house of Achashveirosh (Esther Rabbah 8:7). Why did Esther HaMalkah move from window to window? A possible explanation is: Just as each window offered a different view on the grounds surrounding the palace, the t’filos that she made during those three days took on various angles and forms.