four_4-way Traffic signal using [FlipFlops]

Number of circuits for traffic signal are available on internet but the main purpose behind uploading this video is, there is not a single one with the use of only flipflops IC's.
For proteus file and modelsim code visit the given link.
https://drive.google.com/drive/folders/153Fl_ANPdhHT3GG3sw9wtvTxbd3_CxBJ?usp=sharing.
Thank you!

Видео four_4-way Traffic signal using [FlipFlops] канала Àbdul Baśit