If I have it count up to 1 in 20 seconds, it only takes 10 seconds? It also doesn't seem to be linear, which is fine, but there should be some way to make it l

If I have it count up to 1 in 20 seconds, it only takes 10 seconds? It also doesn't seem to be linear, which is fine, but there should be some way to make it linear And why just up? It'd be great if it could also count down.