Vidacs

function Random(seed) {
  this.seed = Math.random() * Math.pow(2,31);
  this.a = 1103515245;
  this.c = 12345;
  this.m = Math.pow(2, 31);
}

Random.prototype.next = function() {
  this.seed = (this.a * this.seed + this.c) % this.m;
  return this.seed;