Implements a web-based graphics device for animated visualisations. Modelled on the 'base' syntax, it extends the 'base' graphics functions to support frame-by-frame animation and keyframes animation. The target use cases are real-time animated visualisations, including agent-based models, dynamical systems, and animated diagrams. The generated visualisations can be deployed as GIF images / MP4 videos, as 'Shiny' apps (with interactivity) or as HTML documents through embedding into R Markdown documents.