Consturuct a neural network (multilayer perceptrons) using micro:bit

Let's learn the basics of neural networks using micro:bit. For neural network learning to solve various tasks, back propagation is generally required. Learning with this back propagation requires considerably long time calculations. It is not realistic to do this with such a tiny microbit with low computing power, even though it is not impossible. Therefore, here we will try forward calculation only, using the edge weights of the already learned neural network.