How do i update the viewframe so it shows the animation? Please help!

Hello i am making a fnaf like game and need jumpscare animation to pop up on the screen i tried a viewframe gui but it doesn't update i do not know how to update it so i asked here

if someone is wondering this is the code for the dummy to do the animation:

local animation = script:WaitForChild('Animation')
local humanoid = script.Parent:WaitForChild('Humanoid')
local dance = humanoid:LoadAnimation(animation)
dance:Play()

Please help me i need it!