Temporary color prompt in bash script

[Computer Planet <debian@cpnetserver.net>]

Hi guys!
I'm trying, trying and trying but...

How I Can put in hte end of a bash script this command:
PS1="\[\e]0;\u@\h: \w\a\]${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w #\[\033[91m\] "
so that after finishing the script the prompt will write in red...?

If I try in prompt # PS1="\[\e]0;\u@\h: \w\a\]${debian_chroot:+($debian_chroot)}\[\033[01;32m\]\u@\h\[\033[00m\]:\[\033[01;34m\]\w #\[\033[91m\] "
command no problem, write in red until exit or reboot.

Thanks in advance for reply.