Warning, this technique is addicting!
The measurements for the pieces of paper for this first card are 1 1/2x4", then cut each diagonally into 2 triangles (use paper cutter to cut edges straight). You can repeat the pattern or use both sides for different patterns. The paper backing to glue the triangles to is 3x5"-see picture below with triangles glued. You then turn the paper over and trim the excess.
This card below uses modern medley designer paper, scallop circle punches, A Round Array stamp set (for you), and the arrows are from Hello Lovely stamp set. Ribbon is vanilla taffeta and 1/8 " black taffeta.
My inspiration for this card is the sample on pg 110 of the SU catalog. But I made the card regular size, not longer as in the sample. I used cardstock here and some is embossed with the Bigshot and embossing folders. I also stamped on the white card stock.