Creating animation that “unfolds” is a bit of a popular thing these days and right on topic with that, Evan Abrams hosts another premiumbeat tutorial, showing how to create one from scratch in After Effects using some pretty basic techniques.
Learn how to create a visually impressive folding/unfolding animation in Adobe After Effects
there is a bit of “elbow grease” needed to create this style of animation, but not as much as you would initially think. Once you have one triangle working correctly, you can duplicate and change its position and orientation and slowly build up from there. Check out the tutorial for Creating an Unfolding Animation in After Effects here.