555-1 waitfor delay '0:0:15' --

It looks like you want a 15-second delay. What environment are you in? Windows CMD, PowerShell, or Unix/Linux shell? Here are quick options:

• Windows CMD (batch): timeout /t 15 /nobreak
• Windows PowerShell: Start-Sleep -Seconds 15
• Linux/macOS shell: sleep 15

If you truly meant a Windows WAITFOR with a signal named "555-1" and a 15-second timeout, the syntax is environment-specific (check with help waitfor on your system). I can tailor it if you tell me which shell or script language you’re using.