This goes SO SLOW. Why would it go slow I thought RunService.Heartbeat is FAST. But maybe not? I ran this on a while true do loop and it went faster. (._.)
game:GetService('RunService').Heartbeat:connect(function() script.Parent.Rotation=script.Parent.Rotation+0.1 end)
game:GetService('RunService').Heartbeat:connect(function() script.Parent.Rotation=script.Parent.Rotation+1 end)
This is pretty fast. A heartbeat is about as fast as wait()