How come my Idle Animation for the NPC doesn't work? [SOLVED BY ME]

Hello! I am trying to create an idle animation for an NPC (As the title suggests). No errors occur, but it isn't working.

local animIdle = Instance.new("Animation")
local hum = script.Parent:WaitForChild("Humanoid")
animIdle.Parent = hum
animIdle.AnimationId = "rbxassetid://507766388"
local anim = hum:LoadAnimation(animIdle)
anim:Play()
--Server Script

This is the view from the explorer tab. The highlighted script is the code right above this paragraph.

All help is appreciated.

Thanks, LennyPlayzYT

R15 has to be used.