Boo Ghost Code

// Boo Ghost Script
// name

using UnityEngine;

class BooGhostScript : MonoBehaviour
{
    // Start is called before the first frame update
    protected void Start()
    {
        {
            Private SpriteRenderer memberSpriteRenderer = null;
        }

        // Update is called once per frame
        void Update()
        {
            // Create a color variable.

            Color localColor;
            localColor = Color.black;

            // Get the sprite color.

            localColor = memberSpritRenderer.color;

            // Change a color.

            localColor.r = 1.0f; // 0.0 is no red, 1.0 is max red.
            localColor.g = 0.5f; // 0.0 is no green, 1.0 is max green.
            localColor.b = 0.0f; // 0.0 is no blue, 1.0 is max blue.
            localColor.a = 0.5f; // 0.0 is completely invisible, 1.0f is completely visible.

            // You have to change the sprite renderer color
            // to actually change the color.

            memberSpriteRenderer.color = localColor;

        }
    }
}