Tetris T-spin Tutrorial (advance)

If you have been playing tetris for a long time, then this tutorial might help you if you want to have a perfect T-spin stacking. I didn't include the guide on when to drop the line block for back to back tetris since it's already obvious as to when to do that. This tutorial focuses more about what pieces to stack, how to stack them, and where to place them. This may not be the best tutorial, but I hope it helps.