House foundation fengshui?

i really dont know about fengshui but we are recenly building a new house. On the laying of foundation, sum1 told me to place 13 coins, others eight, others odd numbers only no even, so what we did was placed 2 sets of 13pcs coinsat the main door and on the remaining post we placed 7 coins each post. did i do it right? or if not, what is the best thing to do next?|||FENG-SUIE - IS BS