Measure and cut the two 2-by-6 boards down to 6 feet 5 inches of length with the saw to make the frame for the door. These lengths fit vertically inside your door frame and jamb. The top of the door has 1/8 of an inch clearance to swing into the door jamb while the bottom will be raised by 7/8 of an inch off the floor.
Measure and cut 14 sections of the 1-by-6 boards with the saw into equal lengths of 2 feet 11 3/4 inches for the door planks. These planks will attach to the two vertical frames on each side of the door and allow 1/8 of an inch of clearance on each side in the door jamb.
Align the two 2-by-6 board sections cut in step 1 on the floor horizontally with the outside edges of each exactly 35 3/4 inches apart to form the outside frame of the door. Place the 14 sections of 1-by-6 boards lengthwise across the frame, butted against each other tightly with their ends on the outside edges of the 2-by-6 boards. Start from the top and attach theses door planks to the frame with two wood screws on each end of the planks, screwing it into the frame and squaring the edges as you go. The door is now assembled and ready to be hung.