how exactly do I make the images appear?

I've been editing this code for awhile now changing the image ids and stuff but these just aren't appearing. I can clearly see the textures changing but they aren't appearing. Below is my basic code for it.

while true do
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731287794"
wait(0.01)
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731287911"
wait(0.01)
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731288017"
wait(0.01)
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731288145"
wait(0.01)
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731288266"
wait(0.01)
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731288400"
wait(0.01)
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731288588"
wait(0.01)
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731288727"
wait(0.01)
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731288858"
wait(0.01)
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731289018"
wait(0.01)
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731289119"
wait(0.01)
script.Parent.Beam.Texture = "http://www.roblox.com/asset/?id=5731287650"
wait(0.01)
end