How to remove the first two characters in a string

Hi, I know how to choose a folder. But what I don’t know how to code is how to remove the first two characters of all the files in a chosen folder. Can someone guide me the in the path. I’m guessing this code will have to be a loop like repeat code.
Thanks in advance.

this is what i found. i just thought i would share this with all of of you all

set theFolder to choose folder
set theResult to display dialog “remove characters in name :” buttons {“Cancel”, “End”, “Beginning”} default answer 1 cancel button “Cancel”
set btn to button returned of theResult
set nCharacters to text returned of theResult as integer
if btn = “End” then set nCharacters to -nCharacters

tell application “Finder”
repeat with thisFile in (get document files in theFolder)
set theFullName to name of thisFile
set {oldTID, AppleScript’s text item delimiters} to {AppleScript’s text item delimiters, “.”}
if (count of text items of theFullName) > 1 then
set properName to my trim((text items 1 thru -2 of theFullName) as text, nCharacters)
set revisedName to ({properName, (get last text item of theFullName)}) as text
set revisedName to my trim(theFullName, nCharacters)
end if
set AppleScript’s text item delimiters to oldTID
set name of thisFile to revisedName
end repeat
end tell

on trim(t, n)
if n > 0 then
return text (n + 1) thru -1 of t
return text 1 thru (n - 1) of t
end if
end trim