What is the most logical next event?

How to make a rock garden in a trough
Pick out the material you would like your trough to be.
You can buy a stone, metal or wood trough from the garden store; these tend to be fairly expensive. You can also use an old butler's sink or metal tub from the reclamation yard.

Options are:
[A]. Collect organic material for your compost pile. There are many different types of materials to make your compost heap, so don't worry about finding the perfect one for your garden.;
[B]. Cut a 20 " x 20 " crosspost from the only skinny piece of scrap material (base, bottom, top). Place the post in a corner of the trough.;
[C]. Remember that solid stone troughs will be very heavy, especially once full of soil and rocks. Try to get a trough planter with drainage holes, or, if possible, drill drainage holes in whatever planter you are using.;
[D]. Cut the trough to the height that you have selected. Adjust the proportions so that there is an equal amount of side cross supports inside and out.;
[C].