Battery Monitor

#!/bin/bash

export DISPLAY=:0.0
a=`acpi -b`
len=${#a}
if [ $len -eq 47 ];then
    prcnt=${a:24:2}
    if [ $prcnt -gt 80 ];then
        echo "Battery:$prcnt%"| osd_cat -p top -A center -f lucidasanstypewriter-bold-12 -c green -d 59
    elif [ $prcnt -gt 60 ];then
        echo "Battery:$prcnt%"| osd_cat -p top -A center -f lucidasanstypewriter-bold-12 -c blue -d 59
    elif [ $prcnt -gt 40 ];then
          echo "Battery:$prcnt%"| osd_cat -p top -A center -f lucidasanstypewriter-bold-12 -c yellow -d 59
    elif [ $prcnt -gt 15 ];then
    echo "Battery:$prcnt%"| osd_cat -p top -A center -f lucidasanstypewriter-bold-12 -c orange -d 59
    else
    echo "Battery:$prcnt%"| osd_cat -p top -A center -f lucidasanstypewriter-bold-12 -c red -d 59
    fi
else
    prcnt=${a:21:2}
    if [ $prcnt -gt 80 ];then
                echo "Battery:$prcnt%"| osd_cat -p top -A center -f lucidasanstypewriter-bold-12 -c green -d 59
        elif [ $prcnt -gt 60 ];then
                echo "Battery:$prcnt%"| osd_cat -p top -A center -f lucidasanstypewriter-bold-12 -c blue -d 59
        elif [ $prcnt -gt 40 ];then
                  echo "Battery:$prcnt%"| osd_cat -p top -A center -f lucidasanstypewriter-bold-12 -c yellow -d 59
        elif [ $prcnt -gt 15 ];then
              echo "Battery:$prcnt%"| osd_cat -p top -A center -f lucidasanstypewriter-bold-12 -c orange -d 59
    else
    echo "Battery:$prcnt%"| osd_cat -p top -A center -f lucidasanstypewriter-bold-12 -c red -d 59
        fi
fi