arr8
CarTrackPlaybackFun8() {
Cesium.Math.setRandomNumberSeed(3);
const start = Cesium.JulianDate.fromDate(new Date(2015, 2, 25, 16));
const stop = Cesium.JulianDate.addSeconds(
start,
360,
new Cesium.JulianDate()
);
viewer.clock.startTi