UNIX for Dummies Questions & Answers

Hello all im currently working on this assignment and a little stump on how to check for an argument heres the instructions:
Step 4:
Modify your script so that if there is an argument called TestError you display the following error message with your usage statement.
TestError found
Example:
$ ./template.sh xxx TestError zzz
Sun May 5 11:28:46 PDT 2013
xxx
*****
usage: ./template.sh argument ...
ERROR: TestError found
*****
zzz
*****
this is the current code im working with

Code:

# template.sh - edit this file
function usage
{
  echo "usage: $0 arguments ..."
  if [ $# -eq 1 ]
  then echo "ERROR: $1"
  fi
}

# Your script starts after this line.
if [ $# -eq 1 ]
then usage
else
name=""
echo $name
date
while [ $# -gt 0 ]
do
 if [ $# -gt 0 ]
 then
  arg=$1
  echo
  echo $1
  echo "*****"
 else
  echo
  usage "Could not find file $1"
 fi
 shift
 done
fi

any help/guidance would be appreciated thanks in advanced

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