diff --git a/code/project/main.py b/code/project/main.py
index f69236d..16eac96 100644
--- a/code/project/main.py
+++ b/code/project/main.py
@@ -1,14 +1,106 @@
 from microbit import *
 import music
-display.show(Image.HAPPY)
 
-while True:
-    
-    if button_a.was_pressed():
-        music.play(music.BIRTHDAY)
+# Constants
+note_names: list[str] = [
+    "C",
+    "Db",
+    "D",
+    "Eb",
+    "E",
+    "F",
+    "Gb",
+    "G",
+    "Ab",
+    "A",
+    "Bb",
+    "B",
+]
+max_octave: int = 8
+max_midi_note: int = 127
 
-    if button_b.was_pressed():
-        music.play(music.FUNK)
+images_set = {
+    "A": Image("09900:" "90090:" "99990:" "90090:" "90090"),
+    "B": Image("99900:" "90090:" "99900:" "90090:" "99900"),
+    "C": Image("09990:" "90000:" "90000:" "90000:" "09990"),
+    "D": Image("99900:" "90090:" "90090:" "90090:" "99900"),
+    "E": Image("99990:" "90000:" "99900:" "90000:" "99990"),
+    "F": Image("99990:" "90000:" "99900:" "90000:" "90000"),
+    "G": Image("09990:" "90000:" "90990:" "90090:" "09990"),
+}
+
+# Logic control
+loop: bool = True
+tone: bool = False
+midi_key: int = 69
+
+
+# Fetch the base image for the note letter from the global dictionary,
+# Then embellish it with the octave pattern (in binary) and potential flat flag
+def get_image(note_letter: str, octave: int) -> Image:
+    base_letter = note_letter[0]
+    base_img = images_set[base_letter]
+    if len(note_letter) > 1 and note_letter[1] == "b":
+        base_img.set_pixel(4, 4, 2)
+    else:
+        base_img.set_pixel(4, 4, 0)
+    binary_big_e: str = bin(octave)[2:]
+    binary_little_e = "".join(
+        reversed(list(binary_big_e))
+    )  # one cannot simply [::-1] in micropy
+    bit_length = len(binary_little_e)
+    for i in range(4):
+        if i < bit_length and binary_little_e[i] == "1":
+            base_img.set_pixel(4, i, 6)
+        else:
+            base_img.set_pixel(4, i, 0)
+    return base_img
+
+
+def get_note(key: int) -> tuple:
+    return ((note_names[key % 12]), ((key // 12) - 1))
+
+
+def manage_tone(midi_key):
+    global tone
+    if pin_logo.is_touched() and tone == False:
+        note = get_note(midi_key)
+        print(str(note[0]), str(note[1]))
+        music.play(str(note[0]) + str(note[1]) + ":4", wait=False, loop=True)
+        tone = True
+    elif pin_logo.is_touched() == False and tone == True:
+        music.stop()
+        tone = False
+
+
+def manage_display(midi_key):
+    note = get_note(midi_key)
+    note_letter = note[0]
+    octave = note[1]
+    display.show(get_image(note_letter, octave), wait=False, loop=True)
+
+
+def log():
+    note = get_note(midi_key)
+    print(midi_key, "-", note[0], "[", note[1], "]")
+
+
+manage_display(midi_key)
+while loop:
+    input = (button_a.was_pressed(), button_b.was_pressed())
+    update = False
+    if input == (False, False):
+        pass
+    elif input == (True, False):
+        update = True
+        midi_key = (midi_key - 1) % max_midi_note
+    elif input == (False, True):
+        update = True
+        midi_key = (midi_key + 1) % max_midi_note
+    else:
+        pass
+    if update:
+        log()
+        manage_display(midi_key)
+    manage_tone(midi_key)
     sleep(100)
-
-
diff --git a/notebook.md b/notebook.md
index 52abba5..0e1f3ed 100644
--- a/notebook.md
+++ b/notebook.md
@@ -1,3 +1,8 @@
+### Tuesday 10-Dec-2024
+📝 [Project](./code/project/README.md): Continued work
+
+📝 [Popgen](./code/popgen/README.md): Continued work
+
 ### Monday 09-Dec-2024
 📝 [Project](./code/project/README.md): I began work on the final project.