A firecracker is connected over a fuse with a Raspberry Pi Microcontroller. Every five minutes, the display on its monitor shows an updated exchange rate of the US-Dollar and the Brazilian Real. If the price falls below 3.00 Real, the microcontroller triggers an electric detonator that ignites the cracker. As soon as the rocket begins moving in the direction of the circular wall opening, the veil is lifted, and the cucumber is revealed.