This image is PNG format, but the original one is SVG, I used Inkscape to draw it.
Licensed under Creative Commons.
I am not an artist, I worked on it while my brain was offline.
The next image for Powered By logo, still need more improvements, you can follow the repository to check if there some updates.
It is similar to this image, i used it as guide lines to draw my own so it is not a reproduce of it, also I used various of images for cheetahs from the internet to design and color it.