diff --git a/.dockerignore b/.dockerignore
index b85fe55..f55198e 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1,7 +1,10 @@
 ./data/logs/*.logs
 ./data/data.db
+./data/profiles/prof_*
 .vscode
 .gitignore
 .idea/
 ./__pycache__/
-./GlobalExambBot/__pycache__/
\ No newline at end of file
+./GlobalExambBot/__pycache__/
+.git
+*.md
\ No newline at end of file
diff --git a/GlobalExamBot/Sheets.py b/GlobalExamBot/Sheets.py
index 507ada3..ba4566f 100644
--- a/GlobalExamBot/Sheets.py
+++ b/GlobalExamBot/Sheets.py
@@ -21,11 +21,11 @@ class Sheets:
         WebDriverWait(self.driver, 15).until(ec.visibility_of_element_located((By.XPATH, self.pagecard_xpath)))
         page_cards = self.driver.find_elements(by=By.XPATH, value=self.pagecard_xpath)
         card_list = []
-        for card in page_cards : 
+        for card in page_cards :
             if not self.manageSheets.link_exist(card.get_attribute('href')):
                 card_list.append(card)
         return card_list
-    
+
     def watch(self, Sheets_el):
         self.actions.move_to_element(Sheets_el).click(Sheets_el).perform()
         WebDriverWait(self.driver, 15).until(ec.visibility_of_element_located((By.XPATH, self.Sheetscard_xpath)))
diff --git a/GlobalExamBot/bot.py b/GlobalExamBot/bot.py
index 77cd3d1..9e72f33 100644
--- a/GlobalExamBot/bot.py
+++ b/GlobalExamBot/bot.py
@@ -1,5 +1,6 @@
 import logging
 import os
+import sys
 
 from GlobalExamBot.helpers import TypeInField, element_exists, wait_between
 from GlobalExamBot.Sheets import Sheets
@@ -11,6 +12,7 @@ from selenium.webdriver.support.ui import WebDriverWait
 from selenium.webdriver.common.keys import Keys
 
 class Bot:
+    
     def __init__(self, driver, action, configuration):
         self.driver = driver
         self.actions = action
@@ -18,7 +20,7 @@ class Bot:
         self.email_xpath = '//input[@name="email"]'
         self.password_xpath = '//input[@name="password"]'
         self.index = 0
-        self.scrollcount = 0
+        self.catindex = 0
         self.categories = ['https://exam.global-exam.com/library/study-sheets/categories/grammar',
                              'https://exam.global-exam.com/library/study-sheets/categories/language-functions',
                              'https://exam.global-exam.com/library/study-sheets/categories/vocabulary']
@@ -33,7 +35,7 @@ class Bot:
         password_el.send_keys(Keys.RETURN)
 
     def run(self):
-        
+
         profile = f'prof_{self.configuration.username}'
 
         if not os.path.exists(f'./Profiles/{profile}'):
@@ -49,20 +51,17 @@ class Bot:
         Sheets_action = Sheets(self.driver, self.actions, self.configuration)
 
         while True:
-            self.driver.get('https://exam.global-exam.com/library/study-sheets/categories/grammar')
+            self.driver.get(self.categories[self.catindex])
             Sheets_list = Sheets_action.search()
             if Sheets_list :
                 logging.info(f'Sheets n°{ self.index }')
                 Sheets_action.watch(Sheets_list[0])
                 self.index +=1
-                self.scrollcount = 0
                 wait_between(3,10)
             else:
-                logging.info('All visible Sheets have already been read. Need to scroll down ...')
-                self.driver.execute_script(f"window.scrollTo(0, document.body.scrollHeight)")
-                self.scrollcount += 1
-                wait_between(5,15)
-                if self.scrollcount > 10:
-                    logging.info('End of page or network error.')
-                    self.scrollcount = 0
-                    logging.info(self.driver.get_log('browser'))
\ No newline at end of file
+                if self.catindex != len(self.categories) - 1 :
+                    logging.info('All visible Sheets have already been read. Use of the next category.')
+                    self.catindex += 1
+                else:
+                    logging.info('No category available.')
+                    sys.exit(1)
diff --git a/GlobalExamBot/constants.py b/GlobalExamBot/constants.py
index 2b263db..7bfc66e 100644
--- a/GlobalExamBot/constants.py
+++ b/GlobalExamBot/constants.py
@@ -1,4 +1,4 @@
 def init():
     global VERSION, APP_NAME
     APP_NAME = 'GlobalExamBot'
-    VERSION = '1.0.0'
\ No newline at end of file
+    VERSION = '1.0.0'
diff --git a/GlobalExamBot/database.py b/GlobalExamBot/database.py
index a3be9c0..9add543 100644
--- a/GlobalExamBot/database.py
+++ b/GlobalExamBot/database.py
@@ -1,6 +1,9 @@
 import sqlite3
 
 class Database:
+    """
+    Database management
+    """
     def __init__(self, database_link='./data/data.db'):
         """
         Database constructor
@@ -18,7 +21,7 @@ class Database:
         c.execute('''INSERT INTO sheet_links (link) VALUES (:link);''', (link,))
         c.close()
         connection.commit()
-   
+
     def link_exist(self, link):
         """
         Returns true if the link exists in the database.
@@ -45,4 +48,4 @@ def create_table_sheets():
     c.execute('''CREATE TABLE IF NOT EXISTS sheet_links
         (id INTEGER PRIMARY KEY AUTOINCREMENT UNIQUE, link text);''')
     c.close()
-    connection.commit()
\ No newline at end of file
+    connection.commit()
diff --git a/GlobalExamBot/driver.py b/GlobalExamBot/driver.py
index 9296519..f6b3de0 100644
--- a/GlobalExamBot/driver.py
+++ b/GlobalExamBot/driver.py
@@ -3,6 +3,9 @@ from selenium.webdriver.common.action_chains import ActionChains
 from selenium.webdriver.chrome.options import Options
 
 class Driver:
+    """
+    Browser management
+    """
     def __init__(self, profile):
         self.profile = profile
         self.chrome_options = None
@@ -10,6 +13,9 @@ class Driver:
         self.action = None
 
     def setup(self, log_path='./data/logs/', headless=True):
+        """
+        Browser configuration
+        """
         self.chrome_options = Options()
 
         # Anti bot detection
@@ -22,7 +28,7 @@ class Driver:
 
         # Maximize Browser
         self.chrome_options.add_argument('--start-maximized')
-        
+
         # Headless Mode
         if headless:
             self.chrome_options.add_argument('--headless')
@@ -44,7 +50,6 @@ class Driver:
         self.chrome_options.add_argument("--disable-low-res-tiling")
         self.chrome_options.add_argument("--log-level=3")
         self.chrome_options.add_argument("--silent")
-        
 
         # Disable save password
         prefs = {'credentials_enable_service': False,
@@ -54,12 +59,12 @@ class Driver:
         # Set profile
         self.chrome_options.add_argument(f'user-data-dir=./data/profiles/{self.profile}')
 
-        self.driver = webdriver.Chrome(f'./ChromeDriver/chromedriver',options=self.chrome_options, service_args=[f'--log-path={log_path}ChromeDriver.log'])
+        self.driver = webdriver.Chrome('./ChromeDriver/chromedriver',options=self.chrome_options, service_args=[f'--log-path={log_path}ChromeDriver.log'])
         self.action = ActionChains(self.driver)
         return self.driver, self.action
-    
+
     def get_driver(self):
         return self.driver
-    
+
     def get_action(self):
-        return self.action
\ No newline at end of file
+        return self.action
diff --git a/GlobalExamBot/helpers.py b/GlobalExamBot/helpers.py
index 6552000..8879ca9 100644
--- a/GlobalExamBot/helpers.py
+++ b/GlobalExamBot/helpers.py
@@ -38,7 +38,7 @@ class Helpers:
     def load_configuration(self):
         """
         this method allows you to load arguments.
-        :return: args 
+        :return: args
         """
         header()
         # Load all configuration variables
@@ -50,10 +50,13 @@ class Helpers:
         return args
 
     def logging_configuration(self, logging_level=logging.INFO, filename='data/logs/bot_globalexam.log'):
+        """
+        Log configuration
+        """
         logging.basicConfig(filename=filename,
                             level=logging_level,
                             format='%(asctime)s - %(levelname)s - %(message)s')
-                
+
         root_logger = logging.getLogger()
         root_logger.setLevel(logging_level)
 
@@ -74,26 +77,26 @@ def header():
     logging.info('==\t                   version : ' + const.VERSION + '                         \t==')
     logging.info('==\t=============================================================\t==')
 
-def wait_between( min, max):
+def wait_between( minimum, maximum):
     """
-    Wait random time in second beetween min and max seconds, to have an not linear behavior and be more human.
+    Wait random time in second beetween min and max seconds,
+    to have an not linear behavior and be more human.
     """
-    rand=uniform(min, max)
+    rand=uniform(minimum, maximum)
     sleep(rand)
 
-def TypeInField(element, xpath, myValue):
+def TypeInField(element, xpath, value):
     """Type in a field"""
-    val = myValue
     elem = element.find_element(by=By.XPATH, value=xpath)
-    for i in range(len(val)):
-        elem.send_keys(val[i])
+    for ele in enumerate(value):
+        elem.send_keys(ele[1])
         wait_between(0.2, 0.4)
     wait_between(0.4, 0.7)
 
 def element_exists(xpath, element, by=By.XPATH):
     """
     Check if an element exist
-    
+
     :return: Boolean
     """
     try:
@@ -101,4 +104,4 @@ def element_exists(xpath, element, by=By.XPATH):
         element.find_element(by=by, value=xpath)
     except:
         return False
-    return True
\ No newline at end of file
+    return True
diff --git a/main.py b/main.py
index bc3d071..6b9bba3 100644
--- a/main.py
+++ b/main.py
@@ -8,14 +8,14 @@ from GlobalExamBot.database import create_table_sheets
 
 from GlobalExamBot.driver import Driver
 from GlobalExamBot.bot import Bot
-    
+
 def main():
     try:
         helpers = Helpers()
 
          # Configuration of the logging library
         helpers.logging_configuration()
-       
+
         # Load all configuration variables
         config = helpers.load_configuration()
 
@@ -24,7 +24,7 @@ def main():
         create_table_sheets()
 
         profile = f'prof_{config.username}'
-        
+
         logging.info(f'Username : {config.username}')
 
         # Initialize driver and actions
@@ -46,4 +46,4 @@ def main():
             sys.exit(1)
 
 if __name__ == "__main__":
-    main()
\ No newline at end of file
+    main()