code: function(element, property, values){
  		values = Array.from(values);
  		if (values[1] == null){
  			values[1] = values[0];
  			values[0] = element.getStyle(property);
  		}
  		var parsed = values.map(this.parse);
  		return {from: parsed[0], to: parsed[1]};
  	}
docs: prepares the base from/to object