diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..827be52
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+*~
+log.txt
\ No newline at end of file
diff --git a/README.md b/README.md
index b77ec26..12d2e6a 100644
--- a/README.md
+++ b/README.md
@@ -4,9 +4,9 @@ An *extremely* lightweight logging framework for BASH scripts.
 Developed and tested on MacOS. This should work on any BASH platform.
 
 ## Log levels
-It supports four levels, default being `INFO`.
+It supports five levels, default being `INFO`.
 
-    ERROR > WARN > INFO > DEBUG
+    FATAL > ERROR > WARN > INFO > DEBUG
 
 
 ## Usage
diff --git a/demo.sh b/demo.sh
index 034e49c..31d1681 100755
--- a/demo.sh
+++ b/demo.sh
@@ -14,3 +14,6 @@ tlog error "Something terrible has happened"
 
 tlog debug "end of script"
 tlog info "Script completed, go home"
+
+tlog fatal "Fatal Warning"
+tlog xyz "Wrong log level"
diff --git a/tinylogger.bash b/tinylogger.bash
index ae36cc8..06889a4 100644
--- a/tinylogger.bash
+++ b/tinylogger.bash
@@ -22,17 +22,33 @@
 # THE SOFTWARE.
 #
 # Author: Nagarjuna Kumarappan <nagarjuna.412@gmail.com>
+#
+# 15.04.2021
+#
+# Changes:
+#  - Log Level fatal added
+#  - Log output redirected to log file
+#  - shellcheck recommendations implemented
+#  - Default catch added
+#
+# Author: Markus Heene <markus.heene@gmail.com>
 
 # defaults
 LOGGER_FMT=${LOGGER_FMT:="%Y-%m-%d %H:%M:%S"}
-LOGGER_LVL=${LOGGER_LVL:="info"}
+# Log messages with the priority from at least will be printed
+LOGGER_LVL=${LOGGER_LVL:="info"} 
+LOG_FILE="log.txt"
 
 function tlog {
+    local action
     action=$1 && shift
     case $action in 
-        debug)  [[ $LOGGER_LVL =~ debug ]]           && echo "$( date "+${LOGGER_FMT}" ) - DEBUG - $@" 1>&2 ;;
-        info)   [[ $LOGGER_LVL =~ debug|info ]]      && echo "$( date "+${LOGGER_FMT}" ) - INFO - $@" 1>&2  ;;
-        warn)   [[ $LOGGER_LVL =~ debug|info|warn ]] && echo "$( date "+${LOGGER_FMT}" ) - WARN - $@" 1>&2  ;;
-        error)  [[ ! $LOGGER_LVL =~ none ]]          && echo "$( date "+${LOGGER_FMT}" ) - ERROR - $@" 1>&2 ;;
+        debug)  [[ $LOGGER_LVL =~ debug ]]           && echo "$( date "+${LOGGER_FMT}" ) - DEBUG - $*" >>"${LOG_FILE}" ;;
+        info)   [[ $LOGGER_LVL =~ debug|info ]]      && echo "$( date "+${LOGGER_FMT}" ) - INFO - $*" >>"${LOG_FILE}"  ;;
+        warn)   [[ $LOGGER_LVL =~ debug|info|warn ]] && echo "$( date "+${LOGGER_FMT}" ) - WARN - $*" >>"${LOG_FILE}"  ;;
+        error)  [[ ! $LOGGER_LVL =~ debug|info|warn|error ]]          && echo "$( date "+${LOGGER_FMT}" ) - ERROR - $*" | tee -a "${LOG_FILE}" 1>&2 ;;
+	fatal)  [[ ! $LOGGER_LVL =~ none ]]                && echo "$( date "+${LOGGER_FMT}" ) - FATAL - $*" | tee -a "${LOG_FILE}" 1>&2 ;;
+	*) echo "$( date "+${LOGGER_FMT}" ) - FATAL - $action unknown Loglevel" | tee -a "${LOG_FILE}" 1>&2 ;;
+
     esac
     true; }