paint method
Paints one frame without regenerating body or eye paths.
Implementation
void paint(ui.Canvas canvas, ui.Size size, AnimatedBlobatarFrame frame) {
final double side = size.width < size.height ? size.width : size.height;
if (side <= 0) return;
canvas.save();
canvas.translate((size.width - side) / 2, (size.height - side) / 2);
canvas.scale(side / 100);
_paintViewBox(canvas, frame);
canvas.restore();
}