diff --git a/serial.py b/serial.py
new file mode 100644
index 0000000..cf7edfb
--- /dev/null
+++ b/serial.py
@@ -0,0 +1,7 @@
+'''Serialisation of data'''
+import csv
+
+with open('test.csv', newline='') as csvfile:
+    spamreader = csv.reader(csvfile, delimiter=' ', quotechar='|')
+    for row in spamreader:
+        print(', '.join(row))
diff --git a/test.csv b/test.csv
new file mode 100644
index 0000000..fba29af
--- /dev/null
+++ b/test.csv
@@ -0,0 +1 @@
+Peter, Hans, Otto
\ No newline at end of file
diff --git a/ui.py b/ui.py
index aaac0ab..6110495 100644
--- a/ui.py
+++ b/ui.py
@@ -1,5 +1,4 @@
 import tkinter as tk
-from day import Day
 
 
 class Application(tk.Frame):
@@ -8,51 +7,19 @@ class Application(tk.Frame):
         self.master = master
         self.pack()
         self.create_widgets()
-        self.day = Day()
 
     def create_widgets(self):
         self.hi_there = tk.Button(self)
+        self.hi_there["text"] = "Hello World\n(click me)"
+        self.hi_there["command"] = self.say_hi
         self.hi_there.pack(side="top")
 
         self.quit = tk.Button(self, text="QUIT", fg="red",
                               command=self.master.destroy)
         self.quit.pack(side="bottom")
 
-        self.begin_day = tk.Button(
-            self, text="begin day", command=self.day_begin)
-        self.begin_day.pack(side="left")
-
-        self.end_day = tk.Button(self, text="end day", command=self.day_end)
-        self.end_day.pack(side="right")
-
-        self.begin_pause = tk.Button(
-            self, text="begin pause", command=self.make_brake)
-        self.begin_pause.pack(side="left")
-
-        self.end_pause = tk.Button(
-            self, text="end pause", command=self.stop_break)
-        self.end_pause.pack(side="right")
-
-    def day_begin(self):
-        self.day.beginDay()
-        self.hi_there["text"] = "Started day"
-
-    def day_end(self):
-        if not self.day.is_day_started():
-            '''change field to: du musst erst day starten'''
-            return
-
-        self.day.endDay()
-        self.hi_there["text"] = "Good Bye"
-        self.day = Day()
-
-    def make_brake(self):
-        self.day.make_break()
-        self.hi_there["text"] = "Have a nice lunch"
-
-    def stop_break(self):
-        self.day.stop_break()
-        self.hi_there["text"] = "Welcome back"
+    def say_hi(self):
+        print("hi there, everyone!")
 
 
 root = tk.Tk()