diff --git a/lucky_melody_machine/coin_slot.gif b/lucky_melody_machine/coin_slot.gif
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diff --git a/lucky_melody_machine/main.gif b/lucky_melody_machine/main.gif
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diff --git a/lucky_melody_machine/main.py b/lucky_melody_machine/main.py
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+++ b/lucky_melody_machine/main.py
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+"""
+Learn your personal lucky melody.
+"""
+
+___name___ = "lucky_melody_machine"
+___license___ = "WTFPL"
+___dependencies___ = ["app", "buttons", "dialogs", "speaker", "sleep", "ugfx_helper"]
+___categories___ = ["Sound"]
+
+import app
+import dialogs
+import speaker
+import sleep
+import time
+import ugfx
+import ugfx_helper
+
+from app import *
+from buttons import is_pressed
+from tilda import Buttons
+
+#
+# CONFIGURATION
+#
+
+APP_TITLE = "Lucky Melody Machine"
+LOCAL_FOLDER =  "lucky_melody_machine/%s"
+STEP_IDX = 0
+
+#
+# FUNCTIONS
+#
+
+def is_int(value):
+    try:
+        i = int(value)
+        return True
+    except ValueError:
+        return False
+
+def show_next_step():
+    global STEP_IDX
+    current_step = STEP_IDX
+    STEP_IDX = (current_step + 1) % len(STEPS) # next step
+    STEPS[current_step]()
+
+def play_note(note, duration):
+    speaker.note(note)
+    sleep.sleep_ms(duration)
+
+def play_coin_fx():
+    play_note("C#7", 200)
+    play_note("G#7", 200)
+    speaker.stop()
+
+def play_melody():
+    play_note("E4", 400)
+    play_note("E4", 400)
+    play_note("E4", 400)
+    play_note("D4", 220)
+    play_note("C4", 200)
+    play_note("E4", 400)
+    play_note("E4", 400)
+    play_note("E4", 400)
+    play_note("D4", 220)
+    play_note("C4", 220)
+    play_note("E4", 400)
+    play_note("E4", 400)
+    play_note("F4", 400)
+    play_note("E4", 400)
+    play_note("D4", 760)
+    speaker.stop()
+
+def loop_notice(text, image, is_numpad=False, interval=4000):
+    next_tick = 0
+    while True:
+        if time.ticks_ms() > next_tick:
+            dialogs.notice(text, title=APP_TITLE)
+            ugfx.display_image(0, 0, LOCAL_FOLDER % image)
+            next_tick = time.ticks_ms() + interval
+
+        if is_numpad:
+            if is_pressed(Buttons.BTN_1) or is_pressed(Buttons.BTN_2) or is_pressed(Buttons.BTN_3) or is_pressed(Buttons.BTN_4) or is_pressed(Buttons.BTN_5) or is_pressed(Buttons.BTN_6) or is_pressed(Buttons.BTN_7) or is_pressed(Buttons.BTN_8) or is_pressed(Buttons.BTN_9):
+                break
+        else:
+            if is_pressed(Buttons.BTN_A):
+                break
+
+        sleep.wfi()
+
+#
+# VIEWS
+#
+
+def show_start():
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "main.gif")
+    sleep.sleep_ms(2000)
+
+    loop_notice("Please insert a coin to\nlearn your personal lucky melody.", "main.gif")
+    show_next_step()
+
+def show_coin():
+    loop_notice("Please insert a coin.", "coin_slot.gif", is_numpad=True)
+    play_coin_fx()
+    show_next_step()
+
+def show_coin_again():
+    loop_notice("Please insert another coin.", "coin_slot.gif", is_numpad=True)
+    play_coin_fx()
+    show_next_step()
+
+def show_weight():
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "main.gif")
+    sleep.sleep_ms(1000)
+
+    while True:
+        input = dialogs.prompt_text("Please enter your weight.", false_text="Cancel")
+        if is_int(input):
+            break
+
+        sleep.wfi()
+
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "main.gif")
+    sleep.sleep_ms(1000)
+
+    while True:
+        input = dialogs.prompt_text("Please enter your correct weight.", false_text="Cancel")
+        if is_int(input):
+            break
+
+        sleep.wfi()
+
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "main.gif")
+
+    with dialogs.WaitingMessage("Please wait.", title="Processing..."):
+        sleep.sleep_ms(2000)
+
+    show_next_step()
+
+def show_std():
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "main.gif")
+    dialogs.prompt_boolean("Did you have STDs?", title=APP_TITLE)
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "main.gif")
+
+    with dialogs.WaitingMessage("Please wait a moment.", title="Processing..."):
+        sleep.sleep_ms(6000)
+
+    show_next_step()
+
+def show_melody():
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "main.gif")
+    sleep.sleep_ms(1000)
+
+    dialogs.notice("You will now hear your personal lucky melody.", title=APP_TITLE)
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "main.gif")
+    play_melody()
+
+    show_next_step()
+
+def show_repeat():
+    dialogs.notice("Please repeat your personal lucky melody.", title=APP_TITLE)
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "rec.gif")
+    sleep.sleep_ms(3000)
+
+    dialogs.notice("PLEASE REPEAT YOUR PERSONAL LUCKY MELODY.", title=APP_TITLE)
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "rec.gif")
+    sleep.sleep_ms(4000)
+
+    dialogs.notice("Please repeat your personal lucky melody a bit louder.", title=APP_TITLE)
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "rec.gif")
+    sleep.sleep_ms(4000)
+
+    dialogs.notice("Unfortunately, this tone\nwas wrong. Please repeat\nyour personal lucky melody\nonce again.", title=APP_TITLE)
+    ugfx.display_image(0, 0, LOCAL_FOLDER % "rec.gif")
+    sleep.sleep_ms(6000)
+
+    dialogs.notice("This lucky melody will help you in every situation.\nMany thanks.", title=APP_TITLE)
+
+    show_next_step()
+
+#
+# INITIALIZATION
+#
+
+ugfx_helper.init()
+speaker.enabled(True)
+STEPS = [show_start, show_coin, show_coin_again, show_weight, show_std, show_melody, show_repeat]
+
+#
+# START
+#
+
+while True:
+    show_next_step()
+
+speaker.stop()
+restart_to_default()
diff --git a/lucky_melody_machine/rec.gif b/lucky_melody_machine/rec.gif
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