Free step by step, showing you how to draw or paint a spider shape. Click here then scroll down that page to see the step by step how-to tutorial. Note: The page loads a little slow but it is worth it for the free ideas for painting that you will see and for the easy drawing how-to.
That page also has ideas for painting spider designs on pumpkins for Halloween. This could be adapted for spider design artwork on other backgrounds, using magic markers, paints, colored pencils and so forth. See for more details: Free Pumpkin Painting Ideas