from previous--

peter"s  plan  was  to  send  johny  in the  diamond  shop  in the  after  noon when  there  are  few  customers, to  reach the  counter  as  he  himself  would  watch  his   activities, from the  main hall, the  main door  of  the  shop  was  of  see  through  glass, he  would  do  something  to  draw  everyone's  attention , giving  johny  a  chance to throw  some  gems  out  of  the  window  in to  the  fountain  tank