Watch the video to gain an understanding of the H-Bridge and how it functions.
Here are some reference images that may be helpful. This concept is typically difficult to grasp initially, so please ask as many questions as you need to understand how the H-Bridge functions.
Exercise
Create a circuit and code that turns the motor in alternating directions using the H-bridge 50%
Expand on your circuit and code to have two motors alternating directions at the same time
using the H-bridge. This will simulate driving forwards and backwards 50%
Total 100%