Power Shell - How to script every stored proc to it's own file in a directory

In powershell through sqlServer:sqlservernamedefaultdatabasesdatabasenamestoredprocedures> I am able to create a text or .sql file with all of the stored procs in the directory into one text file. I am wondering how I can script each stored proc into it's own .sql or txt file.
Here is what I have so far:
foreach($Name in dir) {GCI | % {$_.script()} | out-file C:?.txt}
I have tried 'c:'+$Name+'.txt', ('c:'+$Name+'.txt'), 'c:'+$_.Name+'.txt' , etc. I'm pretty new to powershell and I'm not sure what to do and I can't find out anything on-line that writes to a file without a specific name.
Any help would be appreciated.
Thanks

Here , every stored procedure is created in a file with its name:
Catch procedure Name in the variable $a
foreach($Name in dir) {
$a=$Name.Name
$Name.Script() |out-file c:$a.txt
}