How do I fix this onTouched script that detects properties of another part?

Basically, I want to make a script where one brick is touched and goes transparent and becomes uncollideable, if another brick is hit it will detect that and change to a specific part, in this case, F1S1.

Keep in mind: The parts with the scripts are "hitboxes", and F1 and F1S1 are the bricks being affected.

function onTouched(hit)

if script.Parent.Parent.F1.Transparency == 0 
	then
	script.Parent.Parent.F1S1.Transparency = 0
	script.Parent.Parent.F1S1.CanCollide = true
	script.Parent.Parent.F1.Transparency = 0
	script.Parent.Parent.F1.CanCollide = false

end
end

script.Parent.Touched:connect(onTouched)

Honestly, I'm not sure why you have parts as parents of other parts. You should use a model instead. Try adding :WaitForChild when trying to get something. Here:

local Part = script.Parent

Part.Touched:Conect(function()
	if Part.Parent.Parent:WaitForChild('F1').Transparency == 0 then
		Part.Parent:WaitForChild('F1S1').Transparency = 0
		Part.Parent:WaitForChild('F1S1').CanCollide = true
		Part.Parent:WaitForChild('F1').Transparency = 0
		Part.Parent:WaitForChild('F1').Transparency = false
	end
end)

If this doesn't work, comment and tell me if there is an error. If this helped you in anyway, please Upvote and accept answer.

-- Your Orange, BlackOrange3343 PS: Good luck on your game