Hand-rolling a 'Concentration Tool' for My Son: From Visual Warmup to State Feedback
[!NOTE] The Origin: To help my son enter a deep state of focus during study sessions, I “hand-rolled” a lightweight “Concentration Tool” using pure HTML. No heavy frameworks, just three raw, direct modules. In this post, I’ll share the design logic behind this tool. You can experience it directly by clicking Concentration Tool in the navigation bar. 1. Why “Hand-roll”? There are countless focus apps out there, but they often: ...