Great tutorial on understanding Fourier series and a tetris game based on Fourier series to boot. Here's another helpful website dedicated to Fourier series an

Great tutorial on understanding Fourier series and a tetris game based on Fourier series to boot. Here's another helpful website dedicated to Fourier series and Fourier Transform with videos and books: https://howthefouriertransformworks.com/ https://howthefouriertransformworks.com/