#!/bin/bash

set -x 
MAXDSP=$(ls /tmp/.X*-lock|tail -1|cut -c 8)

NEWDSP="$(( $MAXDSP + 1 ))"

DISPLAY=":$NEWDSP"

X $DISPLAY &

while [ ! -f /tmp/.X"$NEWDSP"-lock ] ; do sleep 1 ; done

exec /usr/local/bin/blender