Pompeii is my guild c: and it is a 1x3/1x2 and so on pixel image (except pompeii is 1x7) with colors that change positions (as in moving down or up). Here is an bigger photo of what a 1x2 pixel background should look like. There is a red pixel on the top and black on the bottom

but is actually only this -->(

) yes, that extremely small spec in the parenthesis.
Also, I think it is a 1x3 pixel (i think) with only a (red) pixel on the top and 2 black on the bottom to only have more of the top where the player's name is to be colored