@Zephyrus
Animated with flash, i'm managed to get the transparency effect and web-support (user chrome or other web browser).
(use dark theme when u wan't to see these gif(s))
1 (repeat infinite) flat design animated
2 other simple fill-in animation. edit: (image isn't smooth because converted to gif)
3 i have no idea with this...
4. Loading/Walking animation. | Here is an APNG format, use chrome/firefox to get the animated view, this format also used for line stickers, the quality is better than GIF(s) Please wait until image fully loaded.