Adapted from Amy Schwab’s Fireworks Surprise Square (http://www.ravelry.com/patterns/library/fireworks-surprise).

The stitch pattern is the same as Amy Schwab’s but it begins differently in order to create a rectangle shape. Please refer to Amy’s pattern for stitch abbreviations and specifics on how to work the stitches.

Margaret MacInnis has also created an excellent tutorial to clarify the stitch pattern (this is also available through the Fireworks Surprise link).

Enjoy :)