Synchronized Multimedia Integration Language

• https://css-tricks.com/guide-svg-animations-smil/
• http://codepen.io/noahblon/blog/an-intro-to-svg-animation-with-smil
• http://www.w3.org/TR/SMIL/
• https://developer.mozilla.org/en-US/docs/Web/SVG/SVG_animation_with_SMIL