Create a function to go from current date to the last date in the timeline with successive d3 animations. Create a "play" button to call this function. Also, call this function on web load (replace current code which just jumps to the last date in the timeline).
Create a function to go from current date to the last date in the timeline with successive d3 animations. Create a "play" button to call this function. Also, call this function on web load (replace current code which just jumps to the last date in the timeline).