Back this time I swear!
Alright thanks and how about your as your avatarI'm assuming you mean a gif? The exact same way as you would on a computer. Click on your name on the upper right corner of your screen, then go to 'Signature'. There you can use [IM.G][/IMG] (without the dot) and paste the link in between or the landscape icon (next to the smiley) in the format tab and paste the link there.