# Anatomy Rig Animate Muscle Lines

This node defines the muscle flex animation.  You will see a few different colors for the flex parameters.  

White - flex value - 1.0\ <mark style="background-color:yellow;">Yellow</mark> - flex value - 0.5\ <mark style="background-color:red;">Muscle Colours</mark> - flex value - 0.0

{% hint style="warning" %}
This node is a work in progress and we will likely be giving more options on visualization soon.
{% endhint %}

### Parameters

**Frame Offset** - For the time being our flex system is primarily based on a look-ahead frame value set to this parameter.