Blueprints For A Wooden Swing Set Where Can I Find Free Blueprints To Make A Futon Bed?

Where can I find free blueprints to make a futon bed? - blueprints for a wooden swing set

I want to build a wooden futon in my room. I think the drawings / plans online for this. Please, thanks to planes.
I will not buy them. I'd CAD plans, which is a special software to view. Can you help me?