I wouldn't pay a penny for this.
For blinkers to be usefull they need to be visible in the daylight and have a substantial distance spread apart from center of vehicle.
Also there are already commercial versions available, search online. Not many cyclist buy them.
Better would be lights that attach to wrists that illuminate/flash only when cyclist use arms to signal to enhance arm signal visibility at night.
But I understand this is an exercise in design, not a real product plan, so in that case go for it.
Al