Sample .plist document to run a shell script at system startup

start-foo.plist

<!-- STARTS THE `capture_videos` SCRIPT ON STARTUP  -->
<?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>start-foo</string>
    <key>ProgramArguments</key>
    <array>
        <string>/bin/bash</string>
        <string>/Users/username/run_foo.sh</string>
    </array>
    <key>RunAtLoad</key>
    <true />
    <key>StandardOutPath</key>
    <string>/tmp/plist_start_foo_output.txt</string>
    <key>StandardErrorPath</key>
    <string>/tmp/plist_start_foo_error.txt</string>
</dict>
</plist>