Dividing iTerm screen and running different commands on each division

iterm_boot.scpt

# makefile

iterm:
	osascript ./start_iterm.scpt $(PWD)


# start_iterm.scpt


on run argv

  launch "iTerm"

  tell application "iTerm"
   activate

   -- my project workspace
   set myterm to (make new terminal)
   tell myterm
    launch session "wagon"

    set number of columns to 160
    set number of rows to 40


    -- create wagon server
    tell the current session to write text "cd " & item 1 of argv
    tell the current session to write text "make server"

    -- watch polvo
    tell i term application "System Events" to keystroke "D" using command down
    -- need a delay after keystroking
    delay 0.1

    tell the current session to write text "cd " & item 1 of argv
    tell the current session to write text "make polvo_watch"

    -- watch images
    tell i term application "System Events" to keystroke "[" using command down
    tell i term application "System Events" to keystroke "d" using command down
    -- need a delay after keystroking
    delay 0.1

    tell the current session to write text "cd " & item 1 of argv
    tell the current session to write text "make images_watch"

    tell i term application "System Events" to keystroke "]" using command down
    tell i term application "System Events" to keystroke "d" using command down

    -- need a delay after keystroking
    delay 0.1
    tell the current session to write text "cd " & item 1 of argv


   end tell



  end tell
end run