Orange dots = landing
Blue dots = takeoff
var landingColor = '#fe761e';
var takeOffColor = '#3081dd';
var lineColor = '#5297ee';
var fps = 60;
var curveFactor = 50;
var speed = 0.99; // between 0 & 1
var drawLines = true;
var batchSize = 12;
forked from bradoyler's block: US Flights animation (Canvas2D)
https://cdnjs.cloudflare.com/ajax/libs/d3/4.10.2/d3.min.js
https://cdnjs.cloudflare.com/ajax/libs/topojson/3.0.2/topojson.min.js