This is a phosphorus detector. It will tell whether you are using Phosphorus or Scratch.
Try them out! It is a very odd script but works perfectly. HOW THIS WORKS -- Scratch thinks True = 1(False = 0), but Phosphorus doesn't. This means that if you put (<1=<1=1>>) then it will simplify it to (<1=true>). In Scratch (<1=true>) = True(but not if you type it!) but in Phosphorus it = False.