code: function makeThrottle(fps){
      var delay = 1000/fps;
      var lastTime = Date.now();
  
  
      if( fps<=0 || fps === Infinity ){
          return returnTrue;
      }
  
      //if an fps throttle has been set then we'll assume
      //it natively runs at 60fps,
      var half = Math.ceil(1000 / 60) / 2;
  
      return function(){
          //if a custom fps is requested
          var now = Date.now();
          //is this frame within 8.5ms of the target?
          //if so then next frame is gonna be too late
          if(now - lastTime < delay - half){
              return false;
          }
          lastTime = now;
          return true;
      };
  }
docs: manage FPS if < 60, else return true;