Why Isn't This Conveyer Script Not Working? I Only Know That You Need While True Do On The Top

I Am Trying To Make A Conveyer Belt This Is My Script That Is Not Working:

while true do local game.Workspace.Part.Velocity if hit.Parent:FindFirstChild("Humanoid") then hit.Parent.Velocity.Speed = 50 end end

I Kind of Expected It To Not Work Because I Don't Know How To Script But, This Is Just Part Of The Method I Am Using.

Thanks If You Responded!