How to delete a part using a value?

If the value for lastbrickspawned was brick288. Then it would have destroyed brick288 in workspace.

local bricktodelete = script.Parent.Parent.Parent.BottomBar.Models.LastBrickSpawned.Value
script.Parent.MouseButton1Down:Connect(function()
	workspace.bricktodelete:Destroy()
end)

You would use an if statement to see if the condition is met. In this case, if the value is equal to 'x', delete the brick.

local brick = game.Workspace.Your_Brick
local bricktodelete = script.Parent.Parent.Parent.BottomBar.Models.LastBrickSpawned.Value

script.Parent.MouseButton1Down:Connect(function()
	if bricktodelete == "brick288" then
		brick:Destroy()
	end
end)