PROMPT: Create a single-file HTML/CSS/JS Canvas animation of a Frogger-style game. Show a character (circle or simple sprite) at the bottom trying to reach the top. Animate 4 horizontal lanes of traffic moving left/right at different speeds with cars/trucks of varying sizes. The character automatically hops forward, pauses to dodge cars with near-miss timing, then continues when safe. Show 'close call' visual effects (screen shake, slow-motion) when barely avoiding collision. Character reaches t