User-agent: *
Crawl-delay: 30

User-agent: Googlebot
User-agent: Yahoo! Slurp
User-agent: bingbot
Disallow:
Crawl-delay: 30

User-agent: AhrefsBot
User-agent: Baiduspider
User-agent: Ezooms
User-agent: MJ12bot
User-agent: YandexBot
Disallow: /
Crawl-delay: 30