I want to make blind npc how do i do this?

So i wanted to make npc that is blind that npc would wander map on paths build by me or just randomly wander If npc hears something it would instantly go check that sound (Btw my npc will be custom rig idk that changes anything) I dont know really much about making ai

You can use this

Script:

local Dummy = script.Parent
local humanoid = Dummy:WaitForChild("Humanoid")
while wait(1) do
	humanoid:MoveTo(Vector3.new(math.random(-100,100),0,math.random(-100,100)))
end