How can I change my teal square to my usual bump avatar?

[bumps-bargains]

I have lost the drawing on my computer and I only have it on the avatar of i-once-was-bump but I want to use it for this id too.

I can't even remember how to access the avatar to try to copy it and then change this one.

Can anyone give me instructions please?

I also want to save it to my computer again because I don't want to have to redraw it.

[bumps-bargains]

Here is the test run

[bumps-bargains]

Looka me, looka me

[amber-eyed-girl]

Wooooohooooooo!!!