Script does not work

Support & Help Requests
#1 
 #!/bin/bash
 # Ubuntu_Mate 18.04 LTS
   seamonkey
  sleep 1
  killall seamonkey

I am trying to be able to shutdown a program after a set amount of time.

#2

from three years ago…
Open and then close a program in bash Support & Help Requests

#3

Thanks.

I found another method.

#!/bin/bash
#
# Use of timeout to kill program after specified time
if [ $# -eq 0 ]; then
  echo "Error! no time given."
  echo "Syntax:"
  echo 
  echo "15s = 15 seconds"
  echo "1m = 1 minute"
  echo "1h = 1 hr"
  exit 1
fi
timeout $1 seamonkey