alternate background color

stripes

#!/usr/bin/gawk -f
#alternate background color like stripes.el(http://www.emacswiki.org/cgi-bin/wiki/stripes.el)
#usage: something command | stripes
BEGIN{ 
        BG=44
        #40     Black
        #41     Red
        #42     Green
        #43     Yellow
        #44     Blue
        #45     Magenta
        #46     Cyan
        #47     White
}
NR%2==0{print "\033["BG"m"$0"\033[49m"}
NR%2==1{print}