The TimeSensor here directs the animation to loop and start on load!

Here are the official Fields and Events, for the TimeSensor node in the VRML text, according to the VRML2 Spec:
 TimeSensor {
  exposedField SFTime   cycleInterval 1
  exposedField SFBool   enabled       TRUE
  exposedField SFBool   loop          FALSE
  exposedField SFTime   startTime     0
  exposedField SFTime   stopTime      0
  eventOut     SFTime   cycleTime
  eventOut     SFFloat  fraction_changed
  eventOut     SFBool   isActive
  eventOut     SFTime   time

------->>> the source for the .wrl file!