Help me make a paint colour change script?

I have been trying to make a game where you can click on a square to paint (pixel art) currently I wanted to make a script where you click on a brick which changes the colour of your "paint".

For the actual drawing script without the colour change, I wrote this:

local part = script.Parent
local clickDetector = script.Parent.ClickDetector

clickDetector.MouseClick:Connect(function()
	part.BrickColor = BrickColor.new("Black")
end)

clickDetector.RightMouseClick:Connect(function()
	part.BrickColor = BrickColor.new("White")
end)

This script only changes the colour of the tile that you click on, and it is only able to paint in one colour. I tried to figure out how to do the colour change script. So I added a part that you click on to change the colour of the paint. I put in a click detector and i added the change colour part into the painting script. Can someone tell me if this is correct? And if it isn't, please help.

local part = script.Parent
local clickDetector = script.Parent.ClickDetector
local changeColour = script.Parent.Parent.changeColourBlue.ClickDetector

changeColour.MouseClick:Connect(function()
	clickDetector.MouseClick:Connect(function()
		part.BrickColor = BrickColor.new("Blue")
	end)
	clickDetector.RightMouseClick:Connect(function()
		part.BrickColor = BrickColor.new("White")
	end)
end)

I will appriciate it if someone helped me. <3

Hi realKazYT, here's my solution.

Add two brick color values into the drawing script. Name the first one "EraseColor" and the second one "DrawColor", then we will start coding.

local part = script.Parent
local eraseColor = script.EraseColor.Value
local drawColor = script.DrawColor.Value -- Getting the values of each brickcolor
local clickDetector = script.Parent.ClickDetector

clickDetector.MouseClick:Connect(function()
    part.BrickColor = BrickColor.new(drawColor) -- I am assuming this is to draw
end)

clickDetector.RightMouseClick:Connect(function()
    part.BrickColor = BrickColor.new(eraseColor) -- I am assuming this is to erase
end)

Now for the color changing script.

local part = script.Parent
local clickDetector = script.Parent.ClickDetector
local changeColour = script.Parent.Parent.changeColourBlue.ClickDetector

changeColour.MouseClick:Connect(function()
	local eraseColor = (Wherever the drawing script is).EraseColor -- Getting both values
	local drawColor = (Wherever the drawing script is).DrawColor
	drawColor.Value = BrickColor.new(Color goes here) -- Setting values to new ones
	eraseColor.Value = BrickColor.new(Color goes here)
	-- Now once a player starts drawing it will use the color set here
end)