Here is a whole tutorial to do this:
How to automatically tweet Now Playing song on your computer to your twitter profile ?
Save a gif to your computer and upload it as your profile picture on Twitter.
It should show up automatically when you have uploaded it as your display picture.
You go to edit profile, click browse and choose a picture from your computer .
Accounts which are updated automatically by a computer rather than a person.
The join date on the Twitter profile cannot be removed.
You can upload a picture of any size and Twitter will automatically resize it.
Save your Facebook picture to your computer and then upload the file as your profile picture within the Twitter settings.
He doesn't have Twitter.
Twitter about it... that's what i do!
The Avi on Twitter is your profile picture (Avitar).
By advertising your profile.
Automatically updated Twitter accounts (such as clock accounts) use API.