animation outline

[SergeLo00001]

can someone please explain to me why sometimes when i add animation it takes out the non rectagle image from the file like i want to, and sometimes it takes the whole image What is it that makes the difference how do i make it so only the image gets piked out not the white behind it
ie:
whole image
////////////////
////////////////
ooo///////////
oooooo///////
oooooo///////
ooo///////////
////////////////

what i want


ooo
oooooo
oooooo
ooo


you know what i mean

[makslane]

The first pixel of image must have the same color of background and will be made transparent.

Other way is use 32 bit images with transparency channel.

[SergeLo00001]

first pixel is top left right? And it has to be the same color as the background of the whole thing? What if my background is animated between 5 colors, do i use the first color?

What is a 32 bit image? and how to make one?

[Game A Gogo]

do not save the format to png since you use paint.

32-bit is 24-bits and 8-bits transparent for each 16581375 color availble.
so its like having 4228250625 but 16581375 color are solid and 255 transparentcy for each.
the program i use for making 32-bits image is IconLover which can be found here.