code: function(element, transition_value) {
  
  		var raw_result = this.from + this.delta * transition_value;
  
  		Firestorm.Element.setStyle(
  			element,
  			this.property_name,
  			Math.floor(raw_result) + this.unit
  		);
  
  	}
docs: Perform animation
  @param {HTMLElement} element
  @param {number} transition_value Value of animation. Usually between 0 and 1, but sometimes it may cross the bounds