Step 1 - cut out a paper/cardboard square the size you want your pinwheel to be. I used a lot of different sizes so cutout a lot of different sized squares from 4cm by 4cm to 12cm by 12cm.
Step 2 - cutout a square of fusible webbing slightly larger than the size of the cardboard square you have chosen.
Step 3 - Fusible side down iron the webbing onto the wrong side of your fabric.
Step 4 - cut fabric out around the webbing.
Step 5 - peel paper backing off webbing. Webbing should be fully fused to the fabric.
Step 6 - Iron squares, webbing side down, onto wrong side of coordinating fabric.
Step 7 - get out your square pattern pieces and cut your squares.
Step 8 - cut 4 diagonal lines starting from each corner of the square and ending halfway to the middle (doesn't have to be too specific, so don't stress).
Step 9 - get your needle and thread out, it's time to sew. :) Tie a knot in the end of your thread and take your needle through the centre of the pinwheel. Start with one corner of the pinwheel. Take one of the points and sew it to the centre of the pinwheel.
Step 10 - Take your needle up through the centre of the pinwheel again, through the first point (this helps to anchor it down).
Step 11 - Repeat for point 2.
Step 12 - Repeat for point 3 and 4.
Step 13 - Sew your button to the centre.