There are several kinds of curtains are used, such as cloth curtains, venetian shades, etc. Curtains are necessary for shielding a window so as to protect the privacy of those inside the door. Moreover, the curtains can provide a beautiful outlook to the window, even the building having the window. In general, the folding and releasing of curtains are controlled by ropes. In the prior art curtains, the curtains presents a dull outlook. In general, the curtains presents as a rectangular shape, which are not attractive to viewers. Thereby, there is an eager demand for a novel design which can improve this prior art defects so as to present a beautiful outlook.