//function fizz_buzz(num){
  if(num%3==0 && num%5==0)
    console.log("fizz buzz");
  else if(num%5==0)
    console.log("buzz");
  else if (num%3==0)
    console.log("fizz");
}




fizz_buzz(15)//

function random_machine(array)
{
  elementnum=array.length;
  Math.floor((Math.random() *elementnum + 1);
}
  random_machine(5,4,3)