This diagram shows the correct and incorrect way to ride a figure eight in a equitation class at a horse show. When the pattern calls for a figure eight, always ride two, equally sized circles with a change of lead (canter) or change of diagonal (diagonal) in the center instead of two loops loosely connected.
This method of riding a equitation pattern is standard but not always emphasized to novices. Full circles, equally sized, with a change of lead/diagonal in the center and a straightening and bending of the horse frequently makes or breaks an equitation class. If you or your horse needs extra room to change the bend or to elongate a simple lead change, it is acceptable to make the circles of your figure eight very large, as long as the are the same size. Large but nice, round circles with a nice change in the center are always preferred over small circles that are less than round or include a late change.
If your equitation pattern calls for a canter coming out of the second circle of the figure eight, you should ideally pick it up as your horse's shoulder hits the exact center of your figure eight. However, if you or your horse have trouble getting the correct lead, ask for your canter a few strides before you arrive at the center of your figure eight. Asking for the canter while your horse is still turning will help ensure he picks up the correct lead.