diff --git a/README.md b/README.md
index a5b3083..fa154e7 100644
--- a/README.md
+++ b/README.md
@@ -189,6 +189,20 @@ _**Tip:** drag the folder that contain your repositories to a terminal window, a
 
         $ npm run gitlogg
 
+### Other Advanced Mode
+1. Install dependencies
+2. run `yarn gitloggs --  -[s|u|q|y] <path/of/the/repo>`
+#### Args to `gitloggs`:
+- s (for since date): is the since date to git log
+- u (for until date): is the until date to git log
+- q (for quarter): is the quarter of year
+- y (for year): is the year to use, default id current year
+#### Examples:
+```yarn gitloggs -- -q 3 <path/of/the/repo>```
+```yarn gitloggs -- -y 2022 -q 2 <path/of/the/repo>```
+```yarn gitloggs -- -s 'Jan 1 2023' -u 'Mar 30 2023' <path/of/the/repo>```
+
+
 #### Parallel Processing
 
 The parallel processing that was released on [v0.1.8](https://github.com/dreamyguy/gitlogg/tree/v0.1.8) had problems with `xargs` and was temporarily removed. The issue is being dealt with through [pull-request #16](https://github.com/dreamyguy/gitlogg/pull/16).
diff --git a/package.json b/package.json
index 9babf7e..4b76b54 100644
--- a/package.json
+++ b/package.json
@@ -28,7 +28,8 @@
   },
   "scripts": {
     "setup": "npm install babel-cli -g && npm install && mkdir -p _output && mkdir -p _repos && mkdir -p _tmp",
-    "gitlogg": "./scripts/gitlogg.sh"
+    "gitlogg": "./scripts/gitlogg.sh",
+    "gitloggs": "./scripts/gitlogg-single-log.sh"
   },
   "engines": {
     "node": ">=4.3.0"
diff --git a/scripts/gitlogg-single-log.sh b/scripts/gitlogg-single-log.sh
new file mode 100755
index 0000000..ac98dc2
--- /dev/null
+++ b/scripts/gitlogg-single-log.sh
@@ -0,0 +1,150 @@
+#!/bin/bash
+
+# https://github.com/dreamyguy/gitinsight
+# https://stackoverflow.com/questions/7069682/how-to-get-arguments-with-flags-in-bash
+while getopts d:q:s:u:y: flag; do
+  case "${flag}" in
+    d) yourpath=${OPTARG} ;;
+    s) since=${OPTARG} ;;
+    u) until=${OPTARG} ;;
+    q) quarter=${OPTARG} ;;
+    y) year=${OPTARG} ;;
+  esac
+done
+
+my_dir="$(dirname "$0")"
+cd $my_dir
+
+source "colors.sh"
+
+cd ..
+
+# define the absolute path to the directory that contains all your repositories.
+# yourpath='./_repos/'
+
+for (( i=0; i<OPTIND-1; i++)); do
+    shift
+done
+
+yourpath="$@"
+# yourpath=$1
+
+# define temporary 'git log' output file that will be parsed to 'json'
+tempOutputFile='_tmp/gitlogg.tmp'
+
+# ensure file exists
+mkdir -p ${tempOutputFile%%.*}
+touch $tempOutputFile
+
+# name and path to this very script, for output message purposes
+thisFile='./scripts/gitlogg-generate-log.sh'
+
+# define path to 'json' parser
+jsonParser='./scripts/gitlogg-parse-json.js'
+
+# initial message
+initialMessage="⚡  ${Pur}~ GITLOGG ~${Yel} ⚡\n\n"
+
+# ensure there's always a '/' at the end of the 'yourpath' variable, since its value can be changed by user.
+# case "$yourpath" in
+#   */)
+#     yourpathSanitized="${yourpath}"   # no changes if there's already a slash at the end - syntax sugar
+#     ;;
+#   *)
+#     yourpathSanitized="${yourpath}/"  # add a slash at the end if there isn't already one
+#     ;;
+# esac
+
+# 'thepath' sets the path to each repository under 'yourpath' (the trailing asterix [*/] represents all the repository folders).
+# thepath="${yourpathSanitized}*/"
+
+
+# function to trim whitespace
+trim() {
+    local var="$*"
+    var="${var#'${var%%[![:space:]]*}'}"   # remove leading whitespace characters
+    var="${var%'${var##*[![:space:]]}'}"   # remove trailing whitespace characters
+    echo -n "$var"
+}
+
+# number of directories (repos) under 'thepath'
+# DIRCOUNT="$(find $thepath -maxdepth 0 -type d | wc -l)"
+
+# trim whitespace from DIRCOUNT
+# DIRNR="$(trim $DIRCOUNT)"
+
+reporef="the one repository"
+
+# determine if we're dealing with a singular repo or multiple
+# if [ "${DIRNR}" -gt "1" ]; then
+#   reporef="all ${Red}${DIRNR}${Yel} repositories"
+# elif [ "${DIRNR}" -eq "1" ]; then
+#   reporef="the one repository"
+# fi
+
+# start counting seconds elapsed
+SECONDS=0
+yourpathSanitized="${yourpath}"
+thepath="${yourpathSanitized}*/"
+
+echo "thepath: ${yourpathSanitized}"
+
+if [ -z "${since}" ]; then
+  since='Apr 1 2023'
+fi
+
+if [ -z "${until}" ]; then
+  until='Jun 30 2023'
+fi
+
+if [ -z "${year}" ]; then
+  year=`date +%Y`
+fi
+
+if [[ $quarter == 1 ]]; then
+  since="Jan 1 ${year}"
+  until="Mar 31 ${year}"
+elif [[ $quarter == 2 ]]; then
+  since="Apr 1 ${year}"
+  until="Jun 30 ${year}"
+elif [[ $quarter == 3 ]]; then
+  since="Jul 1 ${year}"
+  until="Sep 30 ${year}"
+elif [[ $quarter == 4 ]]; then
+  since="Oct 1 ${year}"
+  until="Dec 31 ${year}"
+fi
+
+# if the path exists and is not empty
+if [ -d "${yourpathSanitized}" ] && [ "$(ls $yourpathSanitized)" ]; then
+  echo -e "${initialMessage} Generating ${Pur}git log ${Yel}for ${reporef} located at ${Red}'${thepath}'${Yel}. ${Blu}This might take a while!${RCol}\n"
+  dir=$thepath
+  (cd $dir &&
+        echo -e " ${Whi}Outputting ${Pur}${PWD##*/}${RCol}" >&2 &&
+        git log --since="${since}" --until="${until}" --all --no-merges --shortstat --reverse --pretty=format:'commits\trepository\t'"${PWD##*/}"'\tcommit_hash\t%H\tcommit_hash_abbreviated\t%h\ttree_hash\t%T\ttree_hash_abbreviated\t%t\tparent_hashes\t%P\tparent_hashes_abbreviated\t%p\tauthor_name\t%an\tauthor_name_mailmap\t%aN\tauthor_email\t%ae\tauthor_email_mailmap\t%aE\tauthor_date\t%ad\tauthor_date_RFC2822\t%aD\tauthor_date_relative\t%ar\tauthor_date_unix_timestamp\t%at\tauthor_date_iso_8601\t%ai\tauthor_date_iso_8601_strict\t%aI\tcommitter_name\t%cn\tcommitter_name_mailmap\t%cN\tcommitter_email\t%ce\tcommitter_email_mailmap\t%cE\tcommitter_date\t%cd\tcommitter_date_RFC2822\t%cD\tcommitter_date_relative\t%cr\tcommitter_date_unix_timestamp\t%ct\tcommitter_date_iso_8601\t%ci\tcommitter_date_iso_8601_strict\t%cI\tref_names\t%d\tref_names_no_wrapping\t%D\tencoding\t%e\tsubject\t%s\tsubject_sanitized\t%f\tcommit_notes\t%N\tstats\t' |
+          iconv -f ISO-8859-1 -t UTF-8 |       # convert ISO-8859-1 encoding to UTF-8
+          sed '/^[ \t]*$/d' |                  # remove all newlines/line-breaks, including those with empty spaces
+          tr '\n' 'ȝ' |                        # convert newlines/line-breaks to a character, so we can manipulate it without much trouble
+          tr '\r' ' ' |                        # replace carriage returns with a space, so we avoid new lines popping from placeholders that allow user input
+          sed 's/tȝcommits/tȝȝcommits/g' |     # because some commits have no stats, we have to create an extra line-break to make `paste -d ' ' - -` consistent
+          tr 'ȝ' '\n' |                        # bring back all line-breaks
+          sed '{
+              N
+              s/[)]\n\ncommits/)\
+          commits/g
+          }' |                                 # some rogue mystical line-breaks need to go down to their knees and beg for mercy, which they're not getting
+          paste -d ' ' - - |                   # collapse lines so that the `shortstat` is merged with the rest of the commit data, on a single line
+          awk '{print NR"\\t",$0}' |           # print line number in front of each line, along with the `\t` delimiter
+          sed 's/\\t\ commits\\trepo/\\t\commits\\trepo/g' # get rid of the one space that shouldn't be there
+      ) > "${tempOutputFile}"
+  echo -e "\n ${Gre}The file ${Blu}${tempOutputFile} ${Gre}generated in${RCol}: ${SECONDS}s" &&
+  babel "${jsonParser}" | node                 # only parse JSON if we have a source to parse it from
+# if the path exists but is empty
+elif [ -d "${yourpathSanitized}" ] && [ ! "$(ls $yourpathSanitized)" ]; then
+  echo -e "\n ${Whi}[ERROR 002]: ${Yel}The path to the local repositories ${Red}'${yourpath}'${Yel}, which is set on the file ${Blu}'${thisFile}' ${UYel}exists, but is empty!${RCol}"
+  echo -e " ${Yel}Please move the repos to ${Red}'${yourpath}'${Yel} or update the variable ${Pur}'yourpath'${Yel} to reflect the absolute path to the directory where the repos are located.${RCol}"
+# if the path does not exists
+elif [ ! -d "${yourpathSanitized}" ]; then
+  echo -e "\n ${Whi}[ERROR 001]: ${Yel}The path to the local repositories ${Red}'${yourpath}'${Yel}, which is set on the file ${Blu}'${thisFile}' ${UYel}does not exist!${RCol}"
+  echo -e " ${Yel}Please create ${Red}'${yourpath}'${Yel} and move the repos under it, or update the variable ${Pur}'yourpath'${Yel} to reflect the absolute path to the directory where the repos are located.${RCol}"
+fi