backtick with colors

[JuanPablo]

hi,
  I try make a backtick with automatic change of colors
example
#!/bin/bash
#file name sbacktick
cadena="Bright red on white"
echo -e "\033[47m\033[1;31m $cadena \033[0m"

in screenrc
backtick 1 60 60 $HOME/bin/sbacktick

but no working ... the message is show with normal colors.
any idea ?
many thanks.


references:
http://www.frexx.de/xterm-256-notes/

-- 
JuanPablo