Add Decal to Part? Self Answered

I am writing a script that creates a part and changes it's properties as needed. I also need to add a Decal to each surface (the same decal on every surface).
The PartHelpers.SmoothPart(Part) (line #: 11) function smooth's all of the surfaces, I want to create a similar function for the Decals

Could someone please help me with the code that will add a decal to the part created with the HealthPowerup function?

local function HealthPowerup()
    local Part        = Instance.new("Part", workspace)
    Part.Size         = Vector3.new(3,3,3)
    Part.CanCollide   = true
    Part.Position     = Vector3.new(math.random(100),4, math.random(100))
    Part.Shape        = 0
    Part.BrickColor   = BrickColor.new("Bright red")
    Part.Transparency = .5          
    Part.Anchored     = true

    PartHelpers.SmoothPart(Part)
end

SmoothPart = function(p)
    p.BackSurface = 0
    p.TopSurface = 0
    p.BottomSurface = 0
    p.FrontSurface = 0
    p.LeftSurface = 0
    p.RightSurface = 0
end