# Interactive Watercolor Canvas ## Problem Description Create an interactive watercolor simulation that responds to user touch and scroll interactions. The experience should mimic the organic, flowing nature of watercolor paint on paper while remaining computationally light. ## Requirements Your solution should create a digital canvas where colorful watercolor-like droplets bloom and spread when users interact with the screen. The experience must: 1. Be contained within a single HTML file with embedded CSS and JavaScript 2. Use no external libraries 3. Utilize HTML5 Canvas for all rendering and interactions 4. Be visually elegant while using minimal resources 5. Run smoothly on mobile devices and smaller screens 6. Support both touch and mouse interactions ## Core Functionality - **Scroll Interaction**: As users scroll the page, subtle watercolor blooms should appear along the scroll path, with colors changing gradually based on scroll speed or direction - **Touch/Click Interaction**: Touching or clicking the canvas creates a watercolor bloom that spreads organically from the point of contact - **Drag Interaction**: Dragging creates a continuous trail of watercolor effects that blend naturally - **Diffusion Effect**: Each watercolor bloom should slowly diffuse outward, becoming more transparent over time before fading away - **Color Palette**: Implement a minimal color palette system where users can select from 3-5 watercolor hues - **Blending**: When colors overlap, they should blend naturally like real watercolor paints ## Design Constraints - Keep particle count low to ensure performance - Prioritize the simulation of natural watercolor behavior over complex effects - Use alpha transparency and simple color blending for the diffusion effect - Ensure the experience is beautiful even on small mobile screens - Optimize all calculations to maintain smooth framerates Remember that the beauty of this challenge lies in creating a lightweight simulation that captures the essence of watercolor's organic movement while maintaining excellent performance across all devices.