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Tool: Kākāpō Party Simon Willison’s Weblog Subscribe 26th September 2026 Tool Kākāpō Party I gave presented a closing keynote for the WeAreDevelopers World Congress North America yesterday. As a STAR moment I decided to weave in references to the record breaking kākāpō breeding season we had in 2026. For my closing slide I wanted to celebrate, and I had seen some buzz around how good Claude Opus 5.5 was at creating pixel art animations. So I rounded up three Kakapo photos from Google image search and dropped them into Claude with this prompt: Here are some photos of kakapo parrots just to remind you what they look like I need you to make an animation in animated pixel art on HTML 5 canvas of obviously pixel art kakapo jumping up and down having a party with confetti and suchlike - there should be at least 20 of them Here's the transcript, and this is the resulting page. It's pretty great! I wanted to embed it in a Keynote presentation file, so I downloaded the HTML and told a local Claude Code session: Make me a video of file:///Users/simon/Downloads/kakapo-party.html - you need to load it in a browser and click on it a few times to get the confetti effect, the video should be 15s long don't start clicking until 3s in make sure several clicks are spread around the clickable area Claude Code used Playwright (transcript here) and produced this video, which was exactly what I needed for my final slide: Your browser does not support HTML5 video. Here's the full Playwright script it used, which was pleasingly short: # /// script # dependencies = ["playwright"] # /// import time from playwright.sync_api import sync_playwright W, H = 1280, 720 # Canvas fills the viewport; spread clicks across corners, edges and centre clicks = [ (3.0, 640, 360), # centre (4.2, 160, 120), # top-left (5.4, 1120, 120), # top-right (6.6, 180, 600), # bottom-left (7.8, 1100, 600), # bottom-right (9.0, 640, 100), # top-centre (10.0, 380, 380), # mid-left (11.0, 900, 380), # mid-right (12.2, 640, 620), # bottom-centre (13.2, 640, 300), # finale centre ] with sync_playwright() as p: b = p.chromium.launch() ctx = b.new_context(viewport={"width":W,"height":H}, record_video_dir="vids", record_video_size={"width":W,"height":H}) page = ctx.new_page() t0 = time.time() page.goto("file:///Users/simon/Downloads/kakapo-party.html") for t,x,y in clicks: time.sleep(max(0, t-(time.time()-t0))) page.mouse.click(x,y) time.sleep(max(0, 16.0-(time.time()-t0))) ctx.close(); b.close() Recent articles Claude Opus 5.5, GPT-6 Sol, GPT-6 Luna, and a new price war - 22nd September 2026 Jev introduces a new shape of LLM - System One, aka Decision Models - 21st September 2026 Generating running routes with GPT-6 Astra and ChatGPT Work - 12th September 2026 This is a beat by Simon Willison, posted on 26th September 2026. animation 11 speaking 121 ai 2,250 kakapo 13 playwright 16 generative-ai 1,994 llms 1,961 anthropic 341 claude 313 claude-code 129 Monthly briefing Sponsor me for $10/month and get a curated email digest of the month's most important LLM developments. Pay me to send you less! Sponsor & subscribe Disclosures Colophon © 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026