Can I have help with my texture animation script?

I am by no means a scripter, just a builder. I am trying to animate an arrow texture to move, but it won't work. Looks very, very weird. Just wanted some help. Script:

while true do
	wait(0.1)
	script.Parent.ArrowTexture.StudsPerTileV = script.Parent.ArrowTexture.StudsPerTileV + 5
end

your changing the wrong thing!

Use this:

while true do
	wait(1/1000)
	script.Parent.ArrowTexture.OffsetStudsU = script.Parent.ArrowTexture.OffsetStudsU + 0.1
end