Generate a digital art piece in unreal engine, encapsulating a 'vacation vibes' motif. this should draw upon retro aesthetics and include classic patterns. your design should be a vector image, suitable for a sticker design. use the following pantone colors to drive the color scheme: 12-1706 tcx, 12-0824 tcx, 15-0146 tcx, 15-1164 tcx, 16-6340 tcx, 17-4247 tcx, 18-2043 tcx, 19-6026 tcx. the final piece should exude a warm, holiday-like ambiance.