notify time

cuckoo.scptd

on cuckoo()
	set dateStr to time string of (current date)
	set meow to POSIX path of (path to resource "meow.mp3")
	display notification dateStr with title "Meow"
	do shell script ("afplay " & meow)
end cuckoo

script main
	cuckoo()
end script

run main

io.github.kaiix.cuckoo.plist

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN"
    "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
  <dict>

    <key>Label</key>
    <string>io.github.kaiix.cuckoo</string>

    <key>ProgramArguments</key>
    <array>
        <string>/usr/bin/osascript</string>
        <string>/path/to/cuckoo.scptd</string>
    </array>
    
    <key>StartCalendarInterval</key>
    <array>
        <dict>
            <key>Minute</key>
            <integer>0</integer>
        </dict>
        <dict>
            <key>Minute</key>
            <integer>30</integer>
        </dict>
    </array>
    
    <key>RunAtLoad</key>
    <true/>

  </dict>
</plist>