User-agent: *
Disallow: /testing/

User-agent: myweb
Disallow: / 

User-agent: SemrushBot
Disallow: /

User-agent: MegaIndex
Disallow: /

User-agent: SemrushBot-SA
Disallow: /

User-agent: AhrefsBot 
Disallow: /

User-agent: BLEXBot
Disallow: /

User-agent: PetalBot
Disallow: /