Create shared folder on desktop with powershell

When I run the lines below one at a time in powershell everything works.  I thought I could just paste the text in notepad and save it with a .ps1 extension then run it in powershell to automate the steps but that didn't work.  I have no powershell experience so pardon my ignorance.  How do I turn these individual lines into the powershell equivalent of a batch file?

# Check if the folder exists and if not create a folder named scans on users desktop
IF (!(TEST-PATH c:\users\"$env:username"\Desktop\Scans)) {NEW-ITEM c:\users\"$env:username"\Desktop\Scans -type Directory }

# assign wmiclass win32_share to variable $Shares
$Shares=[WMICLASS]”WIN32_Share”

# Share the folder
$Shares.Create("c:\users\$env:username\Desktop\Scans","scans",0)
HogRingAsked:
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HogRingAuthor Commented:
I figured it out, I pasted the text in notepad and saved it as a ps1 file then in group policy logon script added the file on the powerscript tab.
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