Pasted

#!/bin/bash
 
PERC=`acpi | sed -nr "s/.*[^0-9]([0-9]{1,3})%.*/\1/p"`
LOWPOWER=20
 
if [ $PERC -lt $LOWPOWER ] 
  then
    echo -n "#[fg=red,bold]#[bg=black]! ~ "
fi
 
echo -n $PERC%
 
 
if [ $PERC -lt $LOWPOWER ] 
  then
    echo -n " ~ !#[fg=none]#[bg=none]"
fi