Blue Prints For Building A Wooden Swing Set In Building A House, Does ANYTHING Come Before The Blue Prints?

In building a house, does ANYTHING come before the blue prints? - blue prints for building a wooden swing set

I am writing from a story and personal statement. I AMEK an analogy with the construction of a house. I mean, I've mylife the materials and supplies for school and life experience, and now we just need the plans of the house. But nothing has been printed before the blue? Is it really necessary that a test is awesome! Any ideas ?!??!?!