The present invention relates to a biaxially oriented polyester film, whicha) has a base layer B, which includes a yellow dye and a red dye,b) has, on each side of the base layer B, at least one layer which includes, based on the weight of layer A or C, less than 0. The blank is provided with predetermined fold lines. The robot includes a universal balancing controller with an output feedback control module providing control signals to selectively drive the actuators to balance the robot on a support element which may be configured to provide a dynamic, unstable environment or to provide a static, stable environment. The value of a pixel in the mask layer designates whether the spatially corresponding pixel of the recomposed image will be selected from the spatially corresponding pixels of either the foreground or the background layer. The frangible zone preferably has sufficient strength to resist fracture under rotational forces about the longitudinal axis of the spatula during use. A patterned barrier layer is formed on the transparent conductor and has openings therein wherein the transparent conductor is exposed through the openings in the barrier layer.