First exercise

Take some plain cloth. Drape it over a table or the back of a chair - and try to form some basic folds. Then allow your eye to "zoom in" on the folds of the fabric. Sketch or paint in monochrome (i.e. one colour) the folds of the fabric, allowing the fabric to fill the format right out to the edges.

 The above is a painting from one of my students... He started with exercises like the one I've set here. Anyhow give it a go... post your result...