Need help with a small inexpensive critter proof coop....

I have come to the relalization that I cannot bare to watch my poor brown hens live in fear, and get atacked at every turn. I need to build a small ( just 2 hens) coop that is critter proof, as it is on the edge of the woods, and we have hawk, coons, and probably many other critters I don't know about.

Does anyone have any ideas! Plans? Any suggestions?? Any anything?

Thanks in advance!!