diff --git a/trap/stage.py b/trap/stage.py
index ee96c99..df30427 100644
--- a/trap/stage.py
+++ b/trap/stage.py
@@ -16,7 +16,7 @@ import zmq
 
 from sgan.sgan import data
 from trap import shapes
-from trap.base import DataclassJSONEncoder, Frame, Track
+from trap.base import Camera, DataclassJSONEncoder, DistortedCamera, Frame, Track
 from trap.counter import CounterSender
 from trap.laser_renderer import circle_points, rotateMatrix
 from trap.lines import RenderableLine, RenderableLines, RenderablePoint, SrgbaColor, circle_arc
@@ -25,6 +25,8 @@ from trap.timer import Timer
 from trap.utils import exponentialDecay, relativePointToPolar, relativePolarToPoint
 
 
+logger = logging.getLogger('trap.stage')
+
 class ScenarioScene(Enum):
     DETECTED = 1
     FIRST_PREDICTION = 2
@@ -34,7 +36,7 @@ class ScenarioScene(Enum):
     LOST = -1
 
 LOST_FADEOUT = 3
-PREDICTION_INTERVAL: float|None = 15 # frames
+PREDICTION_INTERVAL: float|None = 20 # frames
 PREDICTION_FADE_IN: float = 3
 PREDICTION_FADE_SLOPE: float = -10
 PREDICTION_FADE_AFTER_DURATION: float = 10 # seconds
@@ -247,6 +249,7 @@ class DrawnScenario(TrackScenario):
 
         # 3. predictions
         self.drawn_predictions = []
+        self.drawn_diffs = []
         for a, (ptrack, next_ptrack) in enumerate(zip(self._predictions, [*self._predictions[1:], None])):
 
             prediction = ptrack.predictions[0] # only use one prediction per timestep/frame/track
@@ -254,10 +257,29 @@ class DrawnScenario(TrackScenario):
                 # not the last one, cut off
                 next_ptrack: Track = self._predictions[a+1]
                 end_step = next_ptrack.frame_index - ptrack.frame_index
+
+                # diff
+                diff_steps_back = ptrack.frame_index - self._track.frame_index
+                if len(self.drawn_positions) < -1*diff_steps_back:
+                    logger.warning("Track history doesn't reach prediction start. Should not be possible. Skip")
+                    pass
+                else:
+                    # trajectory_range = self.camera.[d.get_foot_coords() for d in trajectory_det_range] # in frame coordinate space
+                    trajectory_range = self.drawn_positions[diff_steps_back:diff_steps_back+end_step]
+                    prediction_range = ptrack.predictions[0][:end_step] # in world coordinate space
+                    line = []
+                    for p1, p2 in zip(trajectory_range[::4], prediction_range[::4]):
+                        line.extend([
+                            p1, p2
+                        ])
+                    if len(line):
+                        self.drawn_diffs.append(line)
             else:
                 end_step = None # not last item; show all
             self.drawn_predictions.append(ptrack.predictions[0][:end_step])
 
+
+
             
             
 
@@ -340,6 +362,11 @@ class DrawnScenario(TrackScenario):
                 # points = [RenderablePoint(pos, pos_color) for pos, pos_color in zip(drawn_prediction[PREDICTION_OFFSET:], colors[PREDICTION_OFFSET:])]
                 points = [RenderablePoint(pos, pos_color) for pos, pos_color in zip(drawn_prediction, colors)]
                 lines.append(RenderableLine(points))
+        for drawn_diff in self.drawn_diffs:
+            color = SrgbaColor(0.,1,1.,1.-self.lost_factor())
+            colors = [color.as_faded(1) for a2 in range(len(drawn_diff))]
+            points = [RenderablePoint(pos, pos_color) for pos, pos_color in zip(drawn_diff, colors)]
+            lines.append(RenderableLine(points))
 
         # # print(self.current_state)
         # if self.current_state is self.first_prediction or self.current_state is self.corrected_prediction:
@@ -460,6 +487,7 @@ class Stage(Node):
         self.stage_sock = self.pub(self.config.zmq_stage_addr)
 
         self.counter = CounterSender()
+        self.camera: Optional[DistortedCamera] = None
         
     
     def run(self):