on opening folder this_folder
 
  --finds out who is logged in
  set myusername to do shell script "whoami"
 
  --creates new folder for pic in home folder called Sesame
  --easy to change name of folder by changing next line
  set picFolder to "Sesame"
  set HomeFolder to (path to current user folder)
  tell application "Finder"
    if not (exists folder picFolder of HomeFolder) then
      make new folder at HomeFolder with properties {name:picFolder}
    end if
  end tell
  set PhotoDirectory to ("/Users/" & myusername & "/" & picFolder)
 
  --start by creating an original filename based on the date and time
 
  -- Get the "hour"
  set timeStr to time string of (current date)
  set Pos to offset of ":" in timeStr
  set theHour to characters 1 thru (Pos - 1) of timeStr as string
  set timeStr to characters (Pos + 1) through end of timeStr as string
 
  -- Get the "minute"
  set Pos to offset of ":" in timeStr
  set theMin to characters 1 thru (Pos - 1) of timeStr as string
  set timeStr to characters (Pos + 1) through end of timeStr as string
 
  --Get "day and date" and convert it to something usable
  set DateStr to date string of (current date)
  set Pos to offset of "," in DateStr
  set theDay to characters 1 thru (Pos - 1) of DateStr as string
  set theDATE to characters (Pos + 2) through end of DateStr as string
 
  set Pos to offset of " " in theDATE
  set theDayNumber to characters 1 thru (Pos - 1) of theDATE as string
  set theMonthandYear to characters (Pos + 1) through end of theDATE as string
 
  set Pos to offset of " " in theMonthandYear
  set theMonth to characters 1 thru (Pos - 1) of theMonthandYear as string
  set theyear to characters (Pos + 1) through end of theMonthandYear
 
  -- set the file name
 
  set TheFileName to (theDay & "_" & theDayNumber & "_" & theMonth & "_" & theyear & "_" & theHour & theMin)
 
  -- take the photo
  set SavePhoto to (PhotoDirectory & "/" & TheFileName & ".jpg")
 
  --IMPORTANT COMMENT
  --alter the following line if you have not saved imagesnap to UnixApps
  set ImageSnapCommand to ("/Library/UnixApps/imagesnap" & " " & SavePhoto)
  do shell script ImageSnapCommand
 
  --create log file
  do shell script "date >> " & PhotoDirectory & "/SesameLog.txt"
  delay 10
 
  --hide pic
  do shell script "chflags hidden " & SavePhoto
 
end opening folder