diff --git a/trap/scenarios.py b/trap/scenarios.py
new file mode 100644
index 0000000..4974f60
--- /dev/null
+++ b/trap/scenarios.py
@@ -0,0 +1,125 @@
+
+from enum import Enum
+import time
+from typing import Optional
+from statemachine import Event, State, StateMachine
+from statemachine.exceptions import TransitionNotAllowed
+
+from trap.base import Track
+
+
+class ScenarioScene(Enum):
+    DETECTED = 1
+    FIRST_PREDICTION = 2
+    CORRECTED_PREDICTION = 3
+    LOITERING = 4
+    PLAY = 4
+    LOST = -1
+
+class TrackScenario(StateMachine):
+    detected = State(initial=True)
+    substantial = State()
+    first_prediction = State()
+    corrected_prediction = State()
+    loitering = State()
+    play = State()
+    lost = State(final=True)
+    
+    receive_track = lost.from_(
+        detected, first_prediction, corrected_prediction, loitering, play, substantial, cond="track_is_lost"
+    ) | corrected_prediction.to(loitering, cond="track_is_loitering") | detected.to(substantial, cond="track_is_long")
+
+    receive_prediction = detected.to(first_prediction) | first_prediction.to(corrected_prediction, cond="prediction_is_stale") | corrected_prediction.to(play, cond="prediction_is_playing")
+
+    def __init__(self, track: Track):
+        self._track = track
+        self.first_prediction_track: Optional[Track] = None
+        self.prediction_track: Optional[Track] = None
+        super().__init__()
+
+    def track_is_long(self, track: Track):
+        return len(track.history) > 20
+
+    def track_is_lost(self, track: Track):
+        return track.lost
+
+    def track_is_loitering(self, track: Track):
+        # TODO)) Change to measure displacement over the last n seconds
+        return len(track.history) > (track.fps * 60) # seconds after which someone is loitering
+    
+    def prediction_is_stale(self, track: Track):
+        # TODO use displacement instead of time
+        return bool(self.prediction_track and self.prediction_track.created_at < (time.perf_counter() - 2))
+    
+    def prediction_is_playing(self, Track):
+        return False
+    
+    # @property
+    # def track(self):
+    #     return self._track
+    
+    def set_track(self, track: Track):
+        self._track = track
+        try:
+            self.receive_track(track)
+        except TransitionNotAllowed as e:
+            # state change is optional
+            pass
+    
+    def set_prediction(self, track: Track):
+        if not self.first_prediction_track:
+            self.first_prediction_track = track
+        
+        self.prediction_track = track
+        try:
+            self.receive_prediction(track)
+        except TransitionNotAllowed as e:
+            # state change is optional
+            pass
+    
+    def after_receive_track(self, track: Track):
+        print('change state')
+
+    def on_receive_track(self, track: Track):
+        # on event, because it happens for every receive, despite transition
+        print('updating track!')
+        # self.track = track
+
+    def on_receive_prediction(self, track: Track):
+        # on event, because it happens for every receive, despite transition
+        print('updating prediction!')
+        # self.track = track
+
+    def after_receive_prediction(self, track: Track):
+        # after 
+        self.prediction_track = track
+        if not self.first_prediction_track:
+            self.first_prediction_track = track
+
+    def on_enter_corrected_prediction(self):
+        print('corrected!')
+
+    def on_enter_detected(self):
+        print("DETECTED!")
+
+    def on_enter_first_prediction(self):
+        print("Hello!")
+
+    def on_enter_detected(self):
+        print(f"enter {self.current_state.id}")
+    def on_enter_substantial(self):
+        print(f"enter {self.current_state.id}")
+    def on_enter_first_prediction(self):
+        print(f"enter {self.current_state.id}")
+    def on_enter_corrected_prediction(self):
+        print(f"enter {self.current_state.id}")
+    def on_enter_loitering(self):
+        print(f"enter {self.current_state.id}")
+    def on_enter_play(self):
+        print(f"enter {self.current_state.id}")
+    def on_enter_lost(self):
+        print(f"enter {self.current_state.id}")
+    
+
+
+