var path = {top: [0, 100, 300, 400], left: [0, 100, 300, 400], distance:[], percent:[]};
var totalDistance = 0;
 
// Calculate distance between points using Pythagoras theorem
var distanceX;
var distanceY;
for(var i = 1; i< path.top.length; ++i) {
	distanceX = path.top[i] - path.top[i-1];
	distanceY = path.left[i] - path.left[i-1];
 
	path.distance[i] = Math.sqrt((distanceX * distanceX) + (distanceY * distanceY));	
 
	totalDistance += path.distance[i];
}
 
// Calculate and add property for how many percent part of the animation should take up
for(i = 1; i < path.distance.length; ++i) {
	path.percent[i] = path.distance[i] / totalDistance;
	console.log(i, path.percent[i]);
 
}
 
var frameCounter = 0;
var fps = 10;
var animationDurationInSeconds = 10;
 
//setInterval(updatePosition, 1000 / fps);
 
function updatePosition() {
	if((frameCounter / fps) <= animationDurationInSeconds) {
		var animationPercent = frameCounter / (fps * animationDurationInSeconds);
 
		++frameCounter;
	}	
}