Making LED's light up according to beat?

Hello, I am relatively new to Arduinos, I was wondering something,

I have a sound sensor, I was wondering if I could make it so it lights up led's according to how loud something is? I can't seem to figure it quite out. I have a sound sensor going into A0 and I set if it goes to a certain loudness it just sends a signal out of a digital pin?

Any help is appreciated, thanks.

Light up an increasing quantity of LEDs? 1, 2, 5, 10,etc?