Applescript (osascript): opening split panes in iTerm 2 and performing commands

The following works to open two tabs in iTerm 2.

I can't seem to figure out how to get this to using split panes instead.

I've tried applying what I see on several forums, but it never works. Could someone point me in the right direction?

osascript <<-eof
        tell application "iterm"
                set myterm to (make new terminal)
                tell myterm
                        launch session "Default session"
                        tell the last session
                                set name to "Server"
                                write text "cd $projectsFolder"
                        end tell
                        launch session "Default session"
                        tell the last session
                                set name to "Console"
                                write text "cd $projectsFolder"
                        end tell
                end tell
        end tell
eof

Okay, so I finally figured this out.

By sending keystrokes to the application, you can open and navigate split-pane.

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

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

An example sending commands to split pane and naming each pane. I use this to start my node application.

write text "cd $projectsFolder/$2.m"

write text "/usr/local/bin/frontend.sh $1 $2"

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

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

set name to "$2.api"

write text "cd $projectsFolder/$2.api"

write text "/usr/local/bin/backend.sh $1 $2"