The Beg class is a cycler which sets up the endCel as the first cel, and cycleDir as cdBACKWARD.
Properties
client
caller
cycleDir
cycleCnt
completed
endCel
Methods
void init(heapPtr theClient[, heapPtr theCaller])
Sets up the cycle with theClient as it's client, the client's first cel as it's endCel and cdBACKWARD as it's direction. If specified, it sets the caller
to theCaller, otherwise, it sets it to NULL.