Does anyone write a first draft of a script and just move on to the next project?

So I've been trying to build my "writing muscle" by writing for an hour everyday.. I've been doing this for the past month and was trying something new by just writing first drafts of ideas of I have and starting another one as soon as I'm done with it. (By the way, these are just short films not features) My hopes are that I will go back and read these drafts and maybe choose one to seriously work on. Has anyone tried doing this? I find I write better second drafts when my memory of writing the first one is gone. Would anyone recommend doing this technique?