How do I make blocks w/ particle mitters appear and disappear? [closed]

Previously, I made a key based off the celestial spirit keys from Fairy Tail and I was able to script the model into being holdable.The thing I need help with is having blocks with particle emitters appear infront of it when the user clicks while holding the key then it disappears after a few seconds. I technically was able to do this on a smaller scale by using this script. function weld() local parts,last = {} local function scan(parent) for _,v in pairs(parent:GetChildren()) do if (v:IsA("BasePart")) then if (last) then local w = Instance.new("Weld") w.Name = ("%s_Weld"):format(v.Name) w.Part0,w.Part1 = last,v w.C0 = last.CFrame:inverse() w.C1 = v.CFrame:inverse() w.Parent = last end last = v table.insert(parts,v) end scan(v) end end scan(script.Parent) for _,v in pairs(parts) do v.Anchored = false end end

weld() script:Remove()

I also used a local script which was function weld() local parts,last = {} local function scan(parent) for _,v in pairs(parent:GetChildren()) do if (v:IsA("BasePart")) then if (last) then local w = Instance.new("Weld") w.Name = ("%s_Weld"):format(v.Name) w.Part0,w.Part1 = last,v w.C0 = last.CFrame:inverse() w.C1 = v.CFrame:inverse() w.Parent = last end last = v table.insert(parts,v) end scan(v) end end scan(script.Parent) for _,v in pairs(parts) do v.Anchored = false end end

weld() script:Remove() These scripts only enabled me to emit particles from the key for a short time but I want to make a more complex design by making blocks reappear with particle emitters and disappear but I only found out how to make blocks disappear when you click them. /:/