Create multiple tmux panes with a SERVER variable

panes.sh

#!/bin/bash

#
# I like to run this like
# cat serverfile | xargs ./panes.sh name-of-pane
#
NAME=$1
shift

if [ $# == 0 ]
then
   echo "You need to provide hostnames as arguments"
   exit 127
fi

tmux new-session -d -s $NAME
tmux send-keys "SERVER=$1"
shift
for PANE in $@
do
   tmux split-window -h
   tmux send-keys "SERVER=${PANE}"
   tmux select-layout tiled
done