after celebrating the new year, one of my friends and i decided to smoke a cigarette out of my kitchen window. as i opened the window looking the sky (that night was pretty clear, no fog or clouds) i saw the object, very strange for the shape, clearly a rectangle, with 2 sequences of light of different color pointing from external edge toward the center of the rectangle. the sequence was rose, yellow, white. at the edges of the rectangle, 2 very brights purple lights. completely without sound. we observed the craft overing in the same position for about 4 minutes. then, very slowly moved to south west and suddendly, after a little shading of colors, disappeared