diff --git a/parser.py b/parser.py
index 0a16231..de4bc91 100755
--- a/parser.py
+++ b/parser.py
@@ -9,6 +9,19 @@ import caldav, icalendar
 
 # Constants definition
 URL = "https://docs.google.com/spreadsheets/u/0/d/e/2PACX-1vQ9yzFLr5mXbIZVK3ucdUZuScAbLoCyPqzHr-5V0aYeCFEz7LuidPdk_EnkkJT-zjemzQQHaKvpeXW2/pubhtml/sheet?headers=false&gid=1619638924"
+TIMETABLE = [
+    ('08:00','08:00'),
+    ('09:00','09:00'),
+    ('10:00','10:15'),
+    ('11:15','11:15'),
+    ('12:15','12:15'),
+    ('13:00','13:00'),
+    ('13:30','13:30'),
+    ('14:30','14:30'),
+    ('15:30','15:45'),
+    ('16:45','16:45'),
+    ('17:45','17:45'),
+]
 
 
 class GoogleSheetsCalParser(HTMLParser):
@@ -18,14 +31,18 @@ class GoogleSheetsCalParser(HTMLParser):
     """
     def __init__(self):
         self.inTable = False
-        self.row = 0
-        self.column = 0
+        self.row = -1
+        self.column = -1
         HTMLParser.__init__(self)
 
     def handle_starttag(self, tag, attrs):
         if self.inTable:
-            ...
-        elif tag == 'table':
+            if tag == 'tr':
+                self.row += 1
+                self.column = -1
+            elif tag == 'td':
+                self.column += 1
+        elif tag == 'tbody':
             self.inTable = True
 
     def handle_endtag(self, tag):