Iron your fabric in half, open it up and then fold the two sides to meet the middle, then iron it in half.
Open up your fabric and put in your interfacing, fold the end of your fabric a half an inch and press.
Then fold the two sides over your interfacing, then fold it in half again then pin to secure and sew the edges.
OK, now it's time for your four, small, strips. Use the same instructions as above.
Fold them in half, sandwiching your D-rings and sew the ends. Grab your long handle, fold it through your D-rings and sew.
Hope you enjoyed this tutorial!