User-agent: * 
Crawl-Delay: 
User-agent: MJ12bot
Disallow: /
User-agent: SemrushBot
Disallow: /
User-agent: BLEXBot
Disallow: /
User-agent: Bytespider
Disallow: /
User-agent: DotBot
Disallow: /
User-agent: SEOkicks
Disallow: /