Basic Hand tools
Stain of your choice
3/4 x 2 strip of oak
Step 1: Cutting Your Material
Then cut 2 squares. One 15 inches and one at 8 inches
Then mark the center of one side and use a straight edge to 2 corners making a triangle.
Then you come 2 1/2 inches on the small sides make a mark and square cut it. Then on the big tip just measure down to whatever looks ovoid and square cut it. I don't remember but my big point was cut down to. For your big shelf you add one inch on your square cuts.
Step 2: Making Your Notches
Mark your 7 inches then use a cut off of your 5/8 ply to mark the other side so you know how wide to run through your saw. Your going to cut each notch at 8 degrees also make sure your angles run the same as your legs.Then set up a jig to run through your saw. Then clean up your cuts with a file or whatever.