Here's a video of an animation sequence tool that I'm working on. It creates a file of 15 frames, but you don't have to use all of the frames in the animation. The last frame is selected with the right mouse button and the last frame index is saved along with the "bitmap" info.
The software can export the bitmaps created as const arrays of bytes to be used in whatever game I will code. This is shown near the end of the video.
The tool can create bitmaps from 6x6 to 50x50 pixels.
I created the tool with a simple object orientated GUI interface that I designed. I'll probably use this frame sequence idea to create an animation sequence object that will be responsible for its frame cycle that can be part of a linked list of animation cycle objects for background and maybe primary animation.
https://www.youtube.com/watch?v=UZbS-PwmiYQ