https://gitlab.synchro.net/main/sbbs/-/issues/1008#note_7870
Of course, I should have thought of that.
I switched to `\1` format just to make my test case for issue #1007 readable on the web. Clearly that change resulted in this issue.
What I had actually used in my animation .js file was the CTRL-A character itself, `0x01`.
The Sublime Text editor renders it like this:
```var lowRed = '<0x01>N<0x01>R<0x01>0';```
I double-checked just now, and my original code works fine. Your octal explanation is the answer.
Sorry to waste your time!
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