Pseudo-Static Regular statement solution

Pseudo-Static regular statements
On the internet to find a lot of information, are to chip anti-theft chain code. The problem I'm encountering now is that with these three statements, all of them are blocked, and they don't show up on their website. Rewritecond Referer: (?! /http (?: www\.xxx\.com)). + This sentence should be in addition to www.xxx.com outside the URL to carry out the anti-theft chain, but this sentence seems to have no effect, seek expert guidance.

# Anti-theft chain
Rewritecond Host: (. +)
Rewritecond Referer: (?! /http (?: www\.xxx\.com)). +
Rewriterule. *\. (?: gif|jpeg|jpg)/block.png [I,o]
------Solution--------------------
Rewritecond Referer: (?! http://\1.*). * Try It

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