a=[];
for (j=0; j<10; j++) a[j]=Math.abs(Math.round(Math.random()*6-0.5));
console.log(a);
j=0;
m=10;
while (j<m)
{ if ((2 <= a[j]) && (a[j] <= 4))
  { a.splice(j, 1);
    m--;
  } 
  else j++;
}
console.log(a);