Abstract: A LED sign which can be programmed to display a desired message can be made utilizing a sign kit comprising (1) one or more faces, wherein each face is comprised of a plurality light emitting diodes; (2) a receiver having erasable, programmable read-only memory and a USB printer port plug; (3) a power supply; and (4) a USB flash drive which is adapted to connecting to the receiver through the USB printer port plug; wherein the USB flash drive is programmed to reset the erasable, programmable read-only memory of the receiver by erasing any preexisting data which may reside in the read-only memory of the receiver and to program the erasable, programmable read-only memory with auto executing script to set the desired message to be displayed. The LED sign can be mounted on a trailer for display as the sign is moving or for display in a stationary location.