Domain: Engineering — Electrical Engineering
Target concept: LED Shift Register Driven by Visible Clock Pulse

Video generation prompt: A row of LEDs connected to a shift register, equipped with a visible clock button or knob and a fixed data source; a hand repeatedly triggers the clock.

Evaluation guide:
(i) Target concept: Serial propagation of a static logic level through cascaded flip-flops in a shift register, made observable via discrete LED outputs and manual clock actuation.
Minimum mechanism: The shift register must be edge-triggered (rising or falling), have internal storage elements (flip-flops), and propagate the input bit synchronously with each clock transition; the fixed data source must be stable and electrically connected to the serial input; the LEDs must be directly driven by register outputs without latching or external logic.
(ii)Storyline: [Frame 0] Static scene: row of unlit LEDs, visible shift register IC, labeled clock button, and fixed HIGH indicator active. [Trigger 1] Hand enters frame, moves toward button, makes firm contact → LED0 illuminates. [Trigger 2] Hand releases, re-enters, presses again → LED0 extinguishes, LED1 illuminates. [Trigger 3] Repeat → LED1 off, LED2 on. [Trigger 4+] Continuation of strict 1:1:1 mapping: one press → one new LED lit → prior LED off. All events occur from fixed frontal viewpoint; no camera motion; lighting remains stable; no object occlusion violates spatial integrity.

Manual:
Experimental Procedure
1. Place a row of 8 LEDs in a straight line, connected to Q0–Q7 outputs of a shift register IC.
2. Connect a momentary push-button (clock input) with visible actuator to the shift register’s CLK pin.
3. Wire a fixed logic HIGH signal (e.g., via pull-up resistor or dedicated indicator LED) to the shift register’s SER/DATA input.
4. Press the clock button repeatedly with hand — one press per frame advance.
Observation of Experimental Phenomena
Each button press causes exactly one additional LED in the row to illuminate sequentially from left to right; no LED remains lit beyond its assigned position; the fixed data source shows constant HIGH state throughout.
Summary of Experimental Principles
A shift register stores and shifts binary data serially on each clock pulse; with fixed HIGH data input, each rising edge propagates a “1” through the register stages, lighting successive output LEDs — demonstrating synchronous serial-to-parallel conversion driven by visible manual clocking.

Prompt Grounding rubric:
level_1: No row of LEDs, no shift-register chip, no clock button or knob, and no hand touching anything appear on screen: none of the objects or actions from the prompt are present.
level_2: Only one of these appears (a row of LEDs, or a chip that could be a shift register, or a clock button/knob), but no hand is shown touching or pressing anything, and no separate fixed data-source indicator (e.g., a small always-lit or labeled input LED) is visible anywhere in frame.
level_3: A row of LEDs sits next to a labeled or chip-shaped shift register; a distinct clock button or knob is visible and looks manually operable; a hand enters frame and makes contact with the clock control at least once; a separate, unchanging data-source indicator (e.g., a steady logic-level LED or a 'DATA=HIGH' label) is visible; all the objects and the pressing action from the prompt are present, but the hand only presses once or twice, or it's unclear whether any LED responds to the press.
level_4: All the objects from score 3 are present, and the hand presses the clock button at least three separate times across the clip, pulling back between presses; each press is followed, within the same clip, by some visible change among the LEDs (a different LED becomes lit) rather than no response at all; the shift-register chip and the data-source indicator stay visibly in place throughout; but one press-to-LED-change pairing looks ambiguous (e.g., the LED changes well before the hand actually touches the button, or well after it has already released and moved away).
level_5: All the objects from score 4 are present, and every one of the hand's presses on the clock button is followed promptly by a visible LED lighting change, with the gap between 'hand touches button' and 'LED state changes' looking consistent from press to press; the data-source indicator never changes appearance; the shift-register chip, LED row, and clock button keep the same relative arrangement on screen throughout the clip, so a viewer can clearly see which chip and control are driving which row of LEDs.

Scientific and Causal Correctness rubric:
level_1: The LEDs do not respond to the clock presses at all, or they respond in a way no shift register would (e.g., all LEDs flash together, brightness fades in and out, or LEDs light with no relation to the presses); pressing the button gives no sense of causing any LED to change.
level_2: LEDs do change state in response to presses, but not in a single advancing step: e.g., two LEDs are lit at once, or a later LED lights up while an earlier one in the row is skipped over; sometimes a press produces no visible LED change at all; the data-source indicator changes partway through the clip even though nothing should be altering it.
level_3: Each press is followed by exactly one LED in the row lighting up, moving one position at a time from the start of the row; the data-source indicator stays constant throughout; but at least once, the LED that lit up on the previous press stays on instead of turning off when the next one lights, so more than one LED ends up lit at the same time.
level_4: Each press advances the lit LED by exactly one position, and the previously lit LED always turns off as the new one turns on, so only one LED is ever lit at a time; no LED outside the expected one flickers or partially lights; the data-source indicator shows one constant, unambiguous state throughout (e.g., always the same color or always on); but the very first frame shows an LED already lit before any press occurs, which doesn't match a register that should start cleared.
level_5: Before the first press, every LED in the row is off; the first press lights only the very first LED, and each subsequent press moves the lit position one step further along the row in the same direction, with the previous LED turning off right around the same moment the next one turns on (never both fully lit together for a noticeable stretch); no LED flickers, dims partially, or changes color; the data-source indicator stays fixed at one constant, legible state (e.g., a steady 'HIGH' label or a solid-colored indicator) that matches the direction and pattern of the lighting throughout.

Spatiotemporal Consistency rubric:
level_1: The row of LEDs or the shift-register chip jumps to a different position or briefly disappears between moments; the hand appears suddenly next to the button or vanishes without moving away; the clock button itself blinks out of view and then reappears; the scene's lighting or shadows change abruptly with no motion to account for it.
level_2: The hand's motion looks broken or jumps partway through its approach or withdrawal; the LED row appears to shift sideways or rotate slightly between one press and the next; the clock button changes apparent size or angle inconsistently from moment to moment; an LED switches on or off instantly with no sense of the light building up or fading, unlike how a real press-and-release would look.
level_3: The LED row, shift-register chip, clock button, and data-source indicator all stay put relative to one another throughout the clip; the hand moves toward the button and away again in a continuous path; LEDs turn on and off within their row without jumping to odd positions; but at one point the hand's position relative to the button briefly looks inconsistent (e.g., it appears to pass behind the button and then in front of it without a visible connecting path).
level_4: Everything from score 3 holds, and in addition the hand's approach and withdrawal never freezes, snaps backward, or teleports; the LED row never drifts sideways, rotates, or changes size; each LED's light appears and fades along the row itself, without an LED's glow spilling perpendicular to the row or onto unrelated objects; the shadow the hand casts on the surface below stays on the same side throughout, matching one unchanging light source.
level_5: Everything from score 4 holds, and in addition the hand speeds up and slows down naturally as it approaches and pulls back from the button on every single press, rather than moving at one constant speed or in an identically repeated motion; each LED's on/off transition takes about the same amount of time as the others rather than some being instant and others gradual; the scene shows no visible shake, flicker, or warped edges on the LEDs, chip, or hand at any point, and nothing in the clip looks like it was cut, pasted together, or sped up/slowed down partway through.