Display Variable from Repeat loop in a Floating Window - applescript

Question

I have an applescript that captures a counter in another application. This works fine but I'd like to output the results to another floating window and have it update with each loop. Does anyone know of a way to do this? Complete newb.
Thanks
EDIT:
My code is:
tell application "System Events"
tell process "MIDI Editor"
with timeout of 0 seconds
repeat
set barCount to value of text field "Main Counter" of group "Counter Display Cluster" of window "Edit: kjhsdf" of application process "MIDI Editor" of application "System Events"
delay 0.01
end repeat
end timeout
end tell
end tell
(Not sure why that last end tell keeps breaking out of the code block!)
So its barCount that I want to mirror in real time in another window

Answer 1

From the Script Editor you can use some AppleScriptObjC to programmatically create a non-modal window with a text field that can be updated. In the example below I am using a repeating timer instead of an AppleScript repeat statement, as tight loops like that will block the user interface. Save the script as an application, with the option set to stay open.
use AppleScript version "2.4" -- Yosemite (10.10) or later
use framework "Cocoa"
use scripting additions
property WindowFrame : {{200, 600}, {150, 50}} -- window location and size
property TextFrame : {{10, 10}, {130, 30}} -- window size minus 20
property mainWindow : missing value
property textField : missing value
property timer : missing value
on run -- example
setup()
update()
set my timer to current application's NSTimer's timerWithTimeInterval:0.25 target:me selector:"update" userInfo:(missing value) repeats:true
current application's NSRunLoop's mainRunLoop's addTimer:timer forMode:(current application's NSDefaultRunLoopMode)
end run
to update() -- update text field
set barCount to ""
with timeout of 0.5 seconds
tell application "System Events" to tell process "MIDI Editor"
set barCount to value of text field "Main Counter" of group "Counter Display Cluster" of window "Edit: kjhsdf"
end tell
end timeout
textField's setStringValue:(barCount as text)
end update
to setup() -- create UI objects
tell (current application's NSTextField's alloc's initWithFrame:TextFrame)
set my textField to it
its setFont:(current application's NSFont's fontWithName:"Menlo" |size|:18)
its setBordered:false
its setDrawsBackground:false
its setSelectable:false
end tell
tell (current application's NSWindow's alloc's initWithContentRect:WindowFrame styleMask:1 backing:(current application's NSBackingStoreBuffered) defer:true)
set my mainWindow to it
its setAllowsConcurrentViewDrawing:true
its setHasShadow:true
its setTitle:"Progress"
its setLevel:(current application's NSFloatingWindowLevel)
its (contentView's addSubview:textField)
its setFrameAutosaveName:"Update Window" -- keep window position
its setFrameUsingName:"Update Window"
its makeKeyAndOrderFront:me
end tell
end setup