Pick up your paper foundation and find the # one section. Turn the paper to the blank side and palce a piece of fabric you want to cover that space over the space. How can you tell... hold it to the light. The fabric should be right side up on the blank side of the foundation. Pin in place with a flat flower head pin and have the needle part inside the perimeter of the section. Now Turn the paper over with the printed side up. Find a piece of card stock in the form of a post card or the like and it must have an edge that is straight and be about 6 inches long.
Place this cardstock edge on the line between space 1 and 2 and fold the paper back on the card exposing the edge of fabric that is covering the number 1 space.
Notice: theere is a pin in section 1 and a pin is in section 2 and the stiching line between section 1 and 2 shows here as a line ending in section 3 and extends out in the seam allowance to the left in this picture. We are going to start preparing for section 3 now... place the card on the line at the edge of sections 1 and 2 by the edge of section 3. Fold the paper back onto the card so you can trim the fabric that will show when you have the paper folded. You will have to loosen the paper from the end of the stitching line you just created to get the fabic flat on the table and the paper folded evenly on the section 3 line as in the next picture.
This is the card in place ready for folding the paper back over it.
With the trimming complete remover the ruler and unfold the paper and lay the paper with the fabric showing.
Now choose the fabric for section three. Place it right sides together with the edge of the fabric lined up with the newly cut edge giving you a 1/4 inch seam allowance between the section 3 and the previous sections. In this picture it is going to line up with the left edge and will be pinned in place so we won't stitch on the pins.
Stitch starting before the seam allowance that will be before the edge of the diamond and continue over the line between the section 1 & 2 and section 3. As shown in this photo. Then take it away from the machine.
Now you are ready to turn the paper over to reveal the third piece stitched in place. Open out the newest fabric and press it over the section you wanted covered. Finger press in place or use a wooden iron. Pin the fabric in place in the secion you were covering. Make sure the fabric is smooth over the paper or you will have loose fabric when you remove the paper and an uneven finished block. Turn the paper over. Determine the line for the next stitching and place the card... fold the paper back over the card and trim the fabric to 1/4 inch. Remove the ruler and card and turn the paper again showing the fabric side of the paper. Now choose the next fabric and line it up on the newly cut edge to follow. Place the next fabric right sides together and aligned with the newly cut edge of fabric already stitched in place. Continue with these steps until all the spaces have fabric over them. Please ask me questions... this is the first of several edits ... that can make it more clear with each question you have...!!!