Why is this not working? the value doesn't go up but it prints check...

I'm confused why it's still not working the problem is the value doesn't go up but the stuff gets printed... like it says check for the print"check")

local v = game.Lighting:WaitForChild("ONE")
local sway = math.random(1, 100) * math.random(0.05, 0.15)
local y = math.random(1,10)
local x = math.random(1,1)
while wait() do
y=math.random(1,10)
wait(15)

print("Changing Values...")
v.Value = v.Value + sway
	
if y == 5 then
	v.Value = v.Value * 1.1 * math.random(1.7, 2.1)
	print("Multiplied ONE")
	elseif y == 6 then 
		v.Value = v.Value - v.Value + 2.50
		print("ONE just crashed!!!")
		elseif y == 6 then 
		v.Value = v.Value + sway
		print("check")
		elseif y == 7 then 
	v.Value = v.Value + sway
		print("check")
		elseif y == 8 then 
	v.Value = v.Value + sway
	print("check")
		elseif y == 9 then 
	v.Value = v.Value + sway
	print("check")
		elseif y == 10 then 
	v.Value = v.Value + sway
	print("check")
		elseif y == 4 then 
	v.Value = v.Value + sway
	print("check")
		elseif y == 3 then 
	v.Value = v.Value + sway
	print("check")
		elseif y == 2 then 
	v.Value = v.Value + sway
	print("check")
		elseif y == 1 then 
	v.Value = v.Value + sway
	print("check")
end
end