Tool that should spawn a part on click doesnt work????

So as you can see from the title, I am trying to make a tool that spawns a part. I have made it so it cant be spammed crashing the server in under a second but it just wont spawn anything . Here u have my code

 local JustSpawned = false   
 local Tool = game.StarterPack.SandTool
 local Player = game:GetService("Players").LocalPlayer;
 local Mouse = Player:GetMouse();
 
 function draw() 
 	local Sand = Instance.new("Part")
 	Sand.Anchored = false
 	Sand.Size = Vector3.new(0.1,0.1,0.1)
 	Sand.BrickColor = BrickColor.new("Sand yellow")
 	JustSpawned = true
 	wait(1)
 	JustSpawned = false
 end
 if Tool.Equipped then
	if JustSpawned == false then
 		Mouse.Button1Down:connect(function() draw() end)
	end
 end

I found a few issues:

1. You didn't parent the Sand

2. Few errors

3. A better syntax could be used

Let's start with the first issue: Parenting

• You need to parent the Sand to the workspace or a descendant of the workspace in order to make it visible.

• It can be garbage-collected if not parented.

Errors

• The position wasn't specified

• Anything on the StarterPack would get automatically re-parented into the player client's Backpack

Syntax

• Tools already has their own function if the mouse clicks while tools are equipped: Activated

• if var == false can be replace with not

• task.wait(n)/task.wait() are advised to use than wait(n)/wait(0

Here is the fixed script: (Assuming it's a Client Script)

local JustSpawned = false   
local Tool = script.Parent

local plr = game:GetService("Players").LocalPlayer
local Character = plr.Character or plr.CharacterAdded:Wait()
local HumanoidRootPart = Character:WaitForChild("HumanoidRootPart") -- // This is if it's R15

function draw() 
	local Sand = Instance.new("Part")
	Sand.Anchored = false
	
	Sand.Size = Vector3.new(0.1,0.1,0.1)
	Sand.Position = Vector3.new(math.random(HumanoidRootPart.Position.X, HumanoidRootPart.Position.X + 20), HumanoidRootPart.Position.Y + 25, math.random(HumanoidRootPart.Position.Z, HumanoidRootPart.Position.Z + 20))
	
	Sand.BrickColor = BrickColor.new("Sand yellow")
	Sand.Parent = workspace
	
	JustSpawned = true
	task.wait(1)
	JustSpawned = false
end

Tool.Activated:Connect(function()
	if not JustSpawned then
		draw()
	end
end)