Trouble Downloading Requirements File

Hello, I am using the blog Manim for Mac by bhowell4 to download the Manim library, and I am having trouble installing the requirements.txt program. I have no coding experience with this kind of thing so I am coming to y'all for help. I have attached screen shots of all of the code that my Terminal spit back out at me (it is a lot of screen shots, and I know that y'all don't need all of them, but I don't have the experience to know what y'all do and do not need). A little background: I successfully got through Step 6 of the walkthrough and am currently working in a virtual environment. I believe I successfully installed sox, FFmpeg, latex, and pycairo. I then got the error message when trying to install the requirements.txt program. To try and fix the problem, I tried upgrading pip, changing the version of opencv-python in the requirements.txt file from 3.4.2.17 to 4.2.0.32, and finally changed the Pillow from 5.2.0 in the same document to 6.2.0, but I ended up downloading version 7.0.0. Thanks in advance.