bali nine ringleaders will face the firing squad at midnight on tuesday .
andrew chan and myruan sukumaran have requested their last wishes .
the men will likely be executed at a place called nirbaya , aka ` death valley '
white clothing will be given to them to wear which represents the after life .
a cross will be placed over their heart as a target for the riflemen .
they can choose to stand , sit or kneel before facing their demise .
they are then given a maximum of three minutes to calm down .
three shooters will have live rounds and nine other will have blanks .
if doctor confirms prisoner is still breathing - final shot fired to side of head .