Function:     Imbox()
Purpose :     Implodes a screen variable off the screen
Usage   :     Imbox(<expN1..4>,<expC>,<expN5>)
Params  :     expN1..4 - coordinates of the saved screen
              expC     - the saved screen
              expN5    - relative speed of implosion - try 20
Example :     imbox(m->box_top,m->box_left,m->box_bot,m->box_right,m->tbox,20)
Returns :     diddly
Found in:     unbox.c