First off: if you write a script on one Beginner Turtle (BT), then you don't
need to copy it to another BT. It automatically gets saved to your character's "library", and that's accessible to
all BTs.
However, if you write a script somewhere else (eg on a regular turtle) and want to copy that into your BT library, things get a little more complicated.
Go to your BT, switch to the code editor, and then hold Ctrl+T to
exit that. You'll go to the same command line a regular turtle boots up to - any scripts you install now go onto the Beginner Turtle's "real drive", not your "library".
Enter in:
pastebin get dfSSzfZR inject
… and also install any other scripts you want library-ised. You can then type "inject <scriptname>" to import those other scripts into your CCEdu library.
You'll be asked to make a new script in your library using the buttons to the side (though you can instead select an existing script if you want to replace that), click back in the terminal window to refocus it, and then press Enter to complete the process.
If you then hold Ctrl+R the turtle will reboot, going back to its regular Beginner state (which you earlier kicked it out of earlier with Ctrl+T).