Why ball "y" doesn't appear after ball "x" destroy?

Hi. I'm bigginer in coding and i like games who have magic skills, so i tried to make a map where is only pvp with magic skills. I tried to make this fireball and is ball "y" is not working

I want to appear "y" ball right where the "x" ball destroy.

Here's the code

local Player = game.Players.LocalPlayer
	local char = Player.Character or Player.CharacterAdded:Wait()
	local head = char:WaitForChild("Head")
	local shot = 1
	local Mouse = Player:GetMouse()
	 
	local x = Instance.new("Part")
	    x.BrickColor = BrickColor.new("White")
	    x.Shape = "Ball"
	    x.Material = "Neon"
	    x.TopSurface = "Smooth"
	    x.BottomSurface = "Smooth"
	    x.Anchored = false
	    x.CanCollide = false
	    x.Transparency = 0
	    x.Size = Vector3.new(40,40,40);
	
	 local y = Instance.new("Part")
		y.BrickColor = BrickColor.new("Black")
		y.Shape = "Ball"
		y.Material = "Neon"
		y.TopSurface = "Smooth"
		y.BottomSurface = "Smooth"
		y.Anchored = false
		y.CanCollide = false
		y.Transparency = 1
		y.Size = Vector3.new(100, 100, 100);
	 
	 
	Mouse.Button1Down:connect(function()


	if shot == 1 then
	        local cl = x:Clone() 
	        local v = Instance.new("BodyVelocity")
	                v.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
	                v.Velocity = Player.Character.Torso.CFrame.lookVector * 110
	                v.Parent = cl
	                cl.Parent = game.Workspace
	                cl.CFrame = Player.Character.Torso.CFrame * CFrame.new(0,1,-5)
	                shot = 0
					wait(1)
					cl:Destroy()
					
	if cl:Destroy() then
		local cly = y:Clone()
		local b = Instance.new("BodyVelocity")
		b.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
		b.Velocity = cl.CFrame.lookVector * 1
		b.Parent = cly
					cly.Parent = game.Workspace
					cly.CFrame = cl.CFrame * CFrame.new(0,1,-5)
					wait(0.4)
					cly:Destroy()
	end
	
	                game.Debris:AddItem(cl, 4)
	                wait(0.6)
	                shot = 1
	        end                         
	 
	end)