BallShadow

public class BallShadow : MonoBehaviour
{
    [SerializeField]
    private GameObject blobShadow;
    [SerializeField]
    LayerMask hitLayerMask;

    private float MAXDISTANCE = 10f;
    private float MAXWIDTH = 0.5f;
    private float MAXHIGHT = 0.2f;

    private SpriteRenderer shadowSpr;

    void Start()
    {
        shadowSpr = blobShadow.GetComponent<SpriteRenderer>();
    }

    // Update is called once per frame
    void Update()
    {
        RaycastHit2D hit = Physics2D.Raycast(transform.position, Vector2.down, Mathf.Infinity, hitLayerMask);

        if (hit.collider.CompareTag("ground"))
        {
            blobShadow.transform.position = hit.point;

            // DISTANCE AND PERCENT OF MAXDISTANCE
            float distance = Mathf.Abs(hit.point.y - transform.position.y);
            float percent = distance / MAXDISTANCE;

            // SHADOW
            blobShadow.transform.localScale = new Vector3(MAXWIDTH - (MAXWIDTH * percent), MAXHIGHT - (MAXHIGHT * percent), 1);
            Color c = Color.black;
            c.a = .5f - .5f * percent;
            shadowSpr.color = c;
        }
    }
}