The "Interface" quilt is built from a single pattern piece, an equilateral triangle, cut from width of fabric strips with a 60 degree ruler. Stack the triangles in vertical rows and sew the rows together, simple as that! No "Y" seams, no hand piecing, no multiple mirror image pieces, just chain-pieced straight seams. Material requirements include: 1 yd Light Green; 1 yd Med. Green; 2 yds Dk. Green; 2/3 yd Lt. Blue; 2/3 yd Med. Blue; 2/3 yd Dk. Blue; 1/2 yd Lt. Pink; 1/2 yd Med. Pink; 1/2 yd Dk. Pink; 1/2 yd Lt. Purple; 1/2 yd Med. Purple; 1/2 yd Dk. Purple; 1/2 yd Lt. Yellow; 1/2 yd Med. Yellow; 1/2 yd Dk. Yellow. 'Interface' quilt pattern by Ruth Ann Berry of Fabric Therapy and The Quilter's Clinic. Finished size is about 65" x 85".