Piecing the Half-square Triangles
Take your two green 9in squares and use a ruler and a marker to draw a diagonal line from corner to corner on the reverse of each square (Fig 2). Don’t worry about what pen you use for this, as you won’t see it in the quilt block.
Piecing the cushion front
Arrange your four Half-square Triangle blocks in two rows of two, referring to the image to make sure the blocks are positioned correctly.