There are plenty of sites that show you how to do that, so i'm not going to re-write it. Instead, I'll post some links below:
Sew Mama Sew
Debutante Clothing has a video here
Modern Pattern Design has more detailed instructions. Keep in mind that this was modern in 1942. This page is a little scary, as they make it look more complicated than it needs to be. However, it's very detailed and if you just take it one line at a time, it is very helpful.