Hello,
In the installation script of FEniCS, I think there is a typo in the lines 19, 20 and 21. The variables RED, GREEN, …etc are defined in the bottom of the file and referenced in those lines.
Yeah, that does look like a mistake (although I believe it will just harmlessly fail to color the text). I don’t know who maintains that script. You might check on the FEniCS Slack channel.