Determine if policy is applied to remote PC using gpresult

I am still learning Powershell (after using vbscript for many years) and still trying to wrap my head around different ways of doing things.  Right now, I am working on a script to parse the output from gprsult (redirected to a txt file) and return if a policy is blocked or not.  I have included my code and a snippet of the gpresult below. 

One issue is my dothing check.  I first tried to use true or false but that didn't work  So I tried swapping to something else and it still doesn't work as expected.

What I was expecting with the code is

Start ForEach
if $line matches then Dothing = true
Else (else so that we go to the top of the foreach and not continue processing into the Dothing)
If doThing = true then
    Dothing = false (set this so that only 1 check is performed)
    if $line = not applied then $blocked = True (exit for)
    Else $blocked = false (exit For)
End foreach
Blocked

but, if I don't include a break in the if/else check it keeps dipping into the dothing.  even if dothing = false   

I hope that this makes sense.  What am I doing wrong?

$file1 = "C:\Users\bouchard\result.txt"
$file2 = "C:\Users\bouchard\result_admin.txt"

$lines = Get-Content $file1
$doThing = "b"#$false
foreach ($line in $lines)
{
	Write-Host "First line"
	If ($line -match "Policy 5") { $doThing = "c" }
	else #added as would immediately go into the dothing 
	{
		if ($doThing = "c")
		{
			$doThing = "b"
			If ($line -match "Not Applied")
			{
				#Write-Host $doThing + $line
				$blocked = "Policy is blocked"
				#break
			}
			else
			{
				#Write-Host $line
				$blocked = "Policy is applied"
				#break
			}
        }		
    }
}
Write-Host $blocked

Snippet of the txt from the gpresult

    Applied Group Policy Objects
    -----------------------------
        Policy 01
        Policy 02
        Policy 03
        Policy 04
        Policy 08

    The following GPOs were not applied because they were filtered out
    -------------------------------------------------------------------
        Policy 05 (move this line to just below policy 04 for file1 testing)
            Filtering:  Not Applied (Unknown Reason)

        Policy 06
            Filtering:  Not Applied (Empty)

        Policy 07
            Filtering:  Not Applied (Empty)


    The computer is a part of the following security groups