Character Animation Loop

I need a 3-5 second character animation based on a provided picture. The animation should be in MP4 format and can be used for games, presentations, or social media.

Requirements:
- Create a looping animation.
- Character poses include walking, running, bored, thinking, angry, etc.
- Style can be cartoonish, realistic, or minimalistic.

Ideal Skills and Experience:
- Proficiency in animation software.
- Experience in character design and animation.
- Ability to create smooth, loopable animations.

Please provide samples of previous work.