How can I build a DIY full-sized bed frame, out of wood/ crates?

I've seen pallets used before and it's just as simple as stacking them on the floor

https://www.hometalk.com/search/posts?filter=Bed%20build

check this pin https://www.pinterest.com/pin/859343172632317343/

Here is an idea! https://www.youtube.com/watch?v=zHjgPIo5alc

Here's a super simple tutorial: https://www.youtube.com/watch?v=zHjgPIo5alc