action void A_BloodOverlay () {
    let po = player.FindPSprite (3);
    let main = player.FindPSprite (PSP_Weapon);

    if (!po || !main)
        return;

    int stage = 0;
         if (invoker.jamstacks >=  8 && invoker.jamstacks < 30) stage = 1;
    else if (invoker.jamstacks >= 30 && invoker.jamstacks < 52) stage = 2;
    else if (invoker.jamstacks >= 52 && invoker.jamstacks < 64) stage = 3;
    else if (invoker.jamstacks >= 64                          ) stage = 4;

    if (stage == 0)
        return;

    string colorLetter = "";
    if (invoker.mBlood ~== "blue")
        colorLetter = "Y";
    else if (invoker.mBlood ~== "green")
        colorLetter = "Z";
    else
        colorLetter = "X";

         if (main.sprite == GetSpriteIndex ("SAWN"))  po.sprite = GetSpriteIndex (String.Format ("S%s%dN", stage, colorLetter));
    else if (main.sprite == GetSpriteIndex ("SAWB"))  po.sprite = GetSpriteIndex (String.Format ("S%s%dB", stage, colorLetter));
    else if (main.sprite == GetSpriteIndex ("SAWS"))  po.sprite = GetSpriteIndex (String.Format ("S%s%dS", stage, colorLetter));
    else if (main.sprite == GetSpriteIndex ("SAWF"))  po.sprite = GetSpriteIndex (String.Format ("S%s%dF", stage, colorLetter));
    else if (main.sprite == GetSpriteIndex ("SAW2"))  po.sprite = GetSpriteIndex (String.Format ("S%s%d2", stage, colorLetter));

    po.frame = main.frame;
}