Year Subtraction Animation

Overview

A brief animation that visually subtracts the year 2004 from 1985, illustrating the negative result of $-19$. The key takeaway is that subtracting a larger year from a smaller one yields a negative difference.

---

Phases

#	Phase Name	Duration	Description
1	Intro	~2s	The title "Year Subtraction" fades in at the top. Simultaneously, the numbers "1985" and "2004" appear side‑by‑side in the center.
2	Subtraction Visual	~4s	An animated arrow points from 2004 to 1985, then a subtraction sign "‑" appears between them. The operation $1985 - 2004$ is highlighted.
3	Result Reveal	~3s	The calculation resolves to $-19$, which slides up from the bottom area and stays highlighted. A brief flash emphasizes the negative sign.
4	Outro	~2s	The result fades out, leaving only the title, which then fades away.

---

Layout

┌─────────────────────────────────────┐
│               TOP AREA               │
├─────────────────────────────────────┤
│               CENTER AREA            │
│   1985   ‑   2004   =   ?            │
├─────────────────────────────────────┤
│               BOTTOM AREA            │
│          Result: -19                 │
└─────────────────────────────────────┘

Area Descriptions

Area	Content	Notes
Top	Title "Year Subtraction"	Fades in at phase start, centered.
Center	The two years with subtraction sign and placeholder for result	Primary visual focus; numbers scale up slightly during the subtraction visual.
Bottom	Final result "-19"	Slides in from below during Result Reveal phase.

---

Notes

• Keep the entire animation under 12 seconds to maintain brevity.
• Use a clean, sans‑serif font for numbers; the negative sign should be bold to draw attention.
• No additional explanatory text is needed; the visual arithmetic conveys the concept.
• All transitions are simple fades or slides; no complex effects.