Create log File for my Script

i need two things for my powershell script

1-show successful message if script run successfully
2- if script run with error write error in log file

Please Guide me

$Folders1 = "C:\inetpub\temp\YYY"
cd $Folders1
md $Folders1\Change
Copy-Item * Change -recurse -Force -Exclude Change
md $Folders1\Change\IPC
Move-Item Change\ZZZ Change\ZZZ
xcopy ZZZ Change\IPC\ZZZ /s /i
xcopy OrgFundamental Change\IPC\OrgFundamental /s /i
xcopy Card Change\Card-ib /s /i
$Folders2 = Get-ChildItem $Folders1\Change
foreach($f in $Folders2)
	{
		if ($f.name -notlike "IPC" -and $f.name -notlike "CardScheduler" -and $f.name -notlike "Scheduler")
		{
			md Change\$f\bin
			Move-Item Change\$f\*.dll Change\$f\bin
            Get-ChildItem  -Path Change\$f "*.exe.config" | Rename-Item -NewName web.config
		}
	}