I replaced the alternator on my car it went out now the battery light is on y

What is your question?

Every time I start car battery light is on on my Saturn 2007 aura I see battery the light alternator replaced now what do I do???

What makes this problem better or worse?

When I start car after I replaced alternator and it stays on till I get driving a ways

How long has your 2007 Saturn Aura had this problem?

Since I replaced alternator yesterday