Animation Curves with Unity

using UnityEngine;

public class Animate : MonoBehaviour {

    //MY BLOG: berkinakkaya.wixsite.com/blog

    AnimationCurve curve;

    [Header("Visual Settings")]
    [SerializeField] float heightMultiplier = 2f;
    [SerializeField] float acceleration = 5f;
    [SerializeField] float maxSpeed = 20f;
    [SerializeField] float curveLength;
    [SerializeField] bool startWithDelay;

    [Header("Colors")]
    [SerializeField] Color cold;
    [SerializeField] Color hot;

    float speed;
    SpriteRenderer sprite;

    void Start()
    {
        sprite = GetComponent<SpriteRenderer>();
        CreateCurve();
    }

    public void CreateCurve()
    {
        curve = new AnimationCurve(); //Construct the curve

        //Set Wrap Modes
        curve.preWrapMode = WrapMode.Loop;
        curve.postWrapMode = WrapMode.Loop;

        //Clear the curve
        for(int i = 0; i < curve.length; i++)
        {
            curve.RemoveKey(i);
        }

        Keyframe[] keys = new Keyframe[3];

        if(startWithDelay)
        {
            keys[0] = new Keyframe(0.5f              , 0);
            keys[1] = new Keyframe(0.5f+curveLength/2, 1);
            keys[2] = new Keyframe(0.5f+curveLength  , 0);
        }
        else
        {
            keys[0] = new Keyframe(0            , 0);
            keys[1] = new Keyframe(curveLength/2, 1);
            keys[2] = new Keyframe(curveLength  , 0);
        }

        curve.keys = keys;
    }

    void Update()
    {
        CalculateSpeed();

        float value = curve.Evaluate(Value());
        Scale(value);
        UpdateColor(value);
    }

    void UpdateColor(float value)
    {
        Color color = Color.Lerp(cold, hot, value);
        sprite.color = color;
    }

    void Scale(float height)
    {
        transform.localScale = Vector3.one + Vector3.up * height * heightMultiplier;
    }

    void CalculateSpeed()
    {
        if(speed < maxSpeed)
            speed += (acceleration * Time.deltaTime);

        speed = Mathf.Clamp(speed, 0, maxSpeed);
    }

    float Value()
    {
        return (Time.time * speed) % curveLength;
    }
}