text: 
  module.exports = function(ecs, game) { // eslint-disable-line no-unused-vars
    ecs.addEach(function rotateAroundCenter(entity, elapsed) { // eslint-disable-line no-unused-vars
  
      var rotation = game.entities.getComponent(entity, "rotation");
      var speed = game.entities.getComponent(entity, "rotateAroundCenter").speed;
      rotation.angle += elapsed / speed;
  
  
    }, "rotateAroundCenter");
  };
  