diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..c4e4390
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,2 @@
+Style/FrozenStringLiteralComment:
+  Enabled: false
diff --git a/Gemfile b/Gemfile
index 7da36ab..07770ad 100644
--- a/Gemfile
+++ b/Gemfile
@@ -61,6 +61,7 @@ group :development do
 
   gem 'error_highlight', '>= 0.4.0', platforms: [:ruby]
 
+  gem 'rainbow'
   gem 'rubocop', require: false
   gem 'rubocop-packaging'
   gem 'rubocop-performance'
@@ -68,7 +69,6 @@ group :development do
   gem 'rubocop-shopify'
   gem 'rubocop-thread_safety'
   gem 'ruby-lsp-rails'
-  # gem 'sorbet'
 end
 
 group :test do
diff --git a/Gemfile.lock b/Gemfile.lock
index 1feb197..c4d464f 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -321,6 +321,7 @@ DEPENDENCIES
   pg (~> 1.1)
   puma (>= 5.0)
   rails (~> 7.1.2)
+  rainbow
   rubocop
   rubocop-packaging
   rubocop-performance
diff --git a/app/controllers/scores_controller.rb b/app/controllers/scores_controller.rb
index fc1b241..d85db33 100644
--- a/app/controllers/scores_controller.rb
+++ b/app/controllers/scores_controller.rb
@@ -5,7 +5,11 @@ class ScoresController < ApplicationController
   # GET /scores
   def index
     @scores = Score.all
-    puts 'hello'
+    logger.info 'this is an information'
+    logger.warn 'this is a warning'
+    logger.error 'this is an error'
+    logger.debug 'this is a debug message'
+    logger.info @scores
   end
 
   # GET /scores/1
diff --git a/config/application.rb b/config/application.rb
index 84b0320..9e0817c 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -1,12 +1,12 @@
-require_relative "boot"
-
-require "rails/all"
+require_relative 'boot'
+require 'rails/all'
 
 # Require the gems listed in Gemfile, including any gems
 # you've limited to :test, :development, or :production.
 Bundler.require(*Rails.groups)
 
 module Debug
+  # Main Application
   class Application < Rails::Application
     # Initialize configuration defaults for originally generated Rails version.
     config.load_defaults 7.1
@@ -14,7 +14,7 @@ module Debug
     # Please, add to the `ignore` list any other `lib` subdirectories that do
     # not contain `.rb` files, or that should not be reloaded or eager loaded.
     # Common ones are `templates`, `generators`, or `middleware`, for example.
-    config.autoload_lib(ignore: %w(assets tasks))
+    config.autoload_lib(ignore: %w[assets tasks])
 
     # Configuration for the application, engines, and railties goes here.
     #
@@ -23,5 +23,6 @@ module Debug
     #
     # config.time_zone = "Central Time (US & Canada)"
     # config.eager_load_paths << Rails.root.join("extras")
+    #
   end
 end
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 2e7fb48..ef755a2 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -1,6 +1,8 @@
-require "active_support/core_ext/integer/time"
+require 'active_support/core_ext/integer/time'
+require_relative '../../lib/formatter/colored_formatter'
+Rainbow.enabled = true
 
-Rails.application.configure do
+Rails.application.configure do # rubocop:disable Metrics/BlockLength
   # Settings specified here will take precedence over those in config/application.rb.
 
   # In the development environment your application's code is reloaded any time
@@ -19,13 +21,13 @@ Rails.application.configure do
 
   # Enable/disable caching. By default caching is disabled.
   # Run rails dev:cache to toggle caching.
-  if Rails.root.join("tmp/caching-dev.txt").exist?
+  if Rails.root.join('tmp/caching-dev.txt').exist?
     config.action_controller.perform_caching = true
     config.action_controller.enable_fragment_cache_logging = true
 
     config.cache_store = :memory_store
     config.public_file_server.headers = {
-      "Cache-Control" => "public, max-age=#{2.days.to_i}"
+      'Cache-Control' => "public, max-age=#{2.days.to_i}"
     }
   else
     config.action_controller.perform_caching = false
@@ -73,4 +75,7 @@ Rails.application.configure do
 
   # Raise error when a before_action's only/except options reference missing actions
   config.action_controller.raise_on_missing_callback_actions = true
+
+  # Colorful Simple Logger Formatter
+  config.log_formatter = ColoredFormatter.new
 end
diff --git a/lib/formatter/colored_formatter.rb b/lib/formatter/colored_formatter.rb
new file mode 100644
index 0000000..8e99a61
--- /dev/null
+++ b/lib/formatter/colored_formatter.rb
@@ -0,0 +1,20 @@
+require 'rainbow'
+
+# ColoredFormatter outputs colored message according to severity
+class ColoredFormatter < Logger::Formatter
+  def call(severity, _time, _program_name, message) # rubocop:disable Metrics/AbcSize,Metrics/MethodLength
+    full_message = message.is_a?(String) ? message : message.inspect
+    case severity
+    when 'DEBUG'
+      "#{Rainbow(severity).gray.bright.underline.bg(:yellow)} - #{Rainbow(full_message).gray}\n"
+    when 'INFO'
+      "#{Rainbow(severity).green.bright.underline.bg(:yellow)} - #{Rainbow(full_message).green}\n"
+    when 'WARN'
+      "#{Rainbow(severity).orange.bright.underline} - #{Rainbow(full_message).orange}\n"
+    when 'ERROR'
+      "#{Rainbow(severity).red.bright.underline} - #{Rainbow(full_message).red}\n"
+    else
+      "unknown severity #{severity}\n"
+    end
+  end
+end