I built an autumn foliage simulator with Grok 4.7, and I never touched a laptop. The prompt: one self-contained HTML file, layered paper-cutout style. A big tree, rolling hills behind it, grass in front. At least 1,500 leaves that detach, flutter, and pile up on the ground. Drag a finger to blow a gust. Add a wind slider and a Regrow button. It has to run at 60 fps on an iPhone. The new workflow: 1. I texted the prompt to my Grok Bot assistant. 2. Grok Bot launched a Cursor cloud agent running Grok 4.7. 3. The agent wrote the file, ran it in a headless browser, checked the console, and sent back the code and a screenshot. 4. I opened the HTML file on my iPhone and screen-recorded it. No copy and paste. No editor. About 22 minutes from prompt to a running sim. What Grok 4.7 built, which it named "Paper Autumn": - 34.6 KB, one file - 2,000 leaves - A cream sky with three puffy cloud cutouts - Rolling hills in layers of tan, dusty rose, sienna and light brown - A dark brown angular tree, thick with golden yellow, burnt orange, deep red and brown leaves - Sharp blades of grass in forest green, olive and lime across the bottom - Soft drop shadows between every layer, so it looks like stacked craft paper - Leaves flutter down and pile up on a ridge at the base of the hills - A drag gust that shakes the branches - A dark red wind slider and Regrow button, plus a live count of leaves still on the tree - Zero console errors My take on the phone: it worked very well on my iPhone, and recording it was very smooth. The part I like most is that I describe the build in a text message and judge the finished result. The assistant handles the rest. The exact prompt are in the first comment.