tmux - how to open up a set of panes without manually entering them?

dev-tmux.sh

#!/bin/sh 

# pane 1
tmux new-session -d 'sudo minicom mydevice'

# pane 2
tmux split-window -h 'sudo watch fastboot devices'
tmux split-window -v -p 90

# pane 3
tmux send-keys -t 2 'cd ~/Desktop/fastboot_devices/; clear' C-j
tmux send-keys -t 2 'sudo ./flashall.sh'

#pane 4
tmux split-window -v -p 20
tmux send-keys -t 3 'cd ~/Desktop/device_info/; clear' C-j
tmux send-keys -t 3 'python ./ssh_connection.py'

tmux select-pane -t 0
tmux -2 attach-session -d