I recently purchased some 2 lead bicolored red and green blinking leds #LTL-2935SJW. When I tested them using a 3v coin cell they will only display one color. What I mean by that is when I place the leads on the battery, one + and 1 - they will display constant red no blinking. When I reverse the leads they will only display constant green no blinking. What do I need to do to make them to blink between red and green? Thanks