JS function to find random number between 1-7

NaiveRandom.js

/**
 * Given a function which produces a random integer in the range 1 to 5, write
 * a function which produces a random integer in the range 1 to 7.
 */

//returns a random number between 1-5 (inclusive)
var random1to5 = function() {
  return Math.ceil(Math.random() * 5);
};

//find a number between 1-7 without Math.random
var random1to7 = function () {
	var c = 0;
	var x = random1to5() + c;
	c = (c + 5) % 35;
	console.log(x);
	console.log((x % 7)+1);
};