Prepare the Squares

• 1). Cut perfectly square blocks of the background fabric, ensuring that the sides of the square are aligned with the straight grain of the fabric. Calculate the size of the squares by adding 1/2 inch to twice the size that you want for the finished square. Use the finished square size to determine how many squares you will need to complete your project.
  
  
• 2). Cut perfectly square blocks of colored fabric with sides 1/8 inch smaller than the finished block size. The "window panes" will be placed at the seams between the background blocks. For a quilt that is X rows by Y columns, the formula to determine the number of colored squares that you need is Y times (X-1) plus X times (Y-1).
  
  
• 3). Fold the background squares in half, right sides together, and make a 1/4-inch seam along each of the short ends. At the folded corner of each seam, cut the corner from the seam allowance to reduce bulk when the square is turned to the right side. Open the seam and press lightly with the iron.
  
  
• 4). Match the seams at the two cut edges and pin with the right sides together. Bring the two folded edges of the seams together by folding in the opposite direction and pushing the midpoint of the folded edge toward the cut edge. Smooth the layers of fabric so they form a triangle with the cut edge at the top with the folded seam edges at the bottom. Pin along the cut edge, taking care not to catch the fabric that has been folded inside.
  
  
• 5). Stitch a 1/4-inch seam, stopping 1 1/2 inches before reaching the opposite side. Leave a 1-inch opening for turning and continue the seam to the end. Clip the corners of the seams to reduce the fabric at the points. Open the seam and press lightly with the iron.
  
  
• 6). Turn the square to the right side and carefully pull out the corners to form well-defined points. Press in place, making sure the squares are uniform sizes and their edges are perpendicular. The edges of this new square are aligned with the fabric bias, which is critical to forming the curves of the window frame.
  
  

Join Sections

• 1). Place the seam edges face up and fold the points of the square so that they meet exactly in the center and press in place. The result should be a perfect square that matches your target finished square size. The seams and the opening should be completely hidden by the folded points. Press in place, pinning if necessary to avoid burning your fingers. The pressed creases mark the seam lines that you will use to join the pieces.
  
  
• 2). Pin two squares together with the seam sides facing out. Stitch along the pressed crease that forms a side of the final square. Continue to attach pieces until you have attached the number of pieces for a row. Repeat until all rows are created. You may choose to create smaller blocks to increase the portability of your project.
  
  
• 3). Pin two rows together with seam sides facing out. Stitch along the pressed creases that form sides of the final squares. Continue until you have attached all of the rows.
  
  

Make the Windows

• 1). Fold the corners of each square along the creased lines and tack with tiny stitches at the centers.
  
  
• 2). Align the corners of a colored square with the seam between two squares. This will form a diamond shape with the other two corners meeting the center points of the adjacent squares.
  
  
• 3). Pull the midpoint of the background that aligns an edge over the colored fabric. Pin in place so the background frame forms a curve with its widest point at the center. The folded frame should completely cover the cut edges of the colored fabric. Stitch in place with tiny stitches, catching only the curved frame and the colored window pane. Repeat for each of the sides of the colored fabric.
  
  
• 4). Add colored panes to each seam until you have reached the border of your finished quilt. All horizontal and vertical seams will be covered by colored windows. The quilt border will have a single row of background-colored triangles pointing into the quilt along each edge.