// noprotect

debugger;

var ground = generateGround(10, 10);

​

function generateGround(height, width)

{

  var ground = [];

  for (var y = 0 ; y < height; y++) 

  {

    ground[y] = [];

    for (var x = 0; x < width; x++) 

    {

        ground[y][x] = tile();

    }  

  }

  return ground;

  function tile()

  {

    return (Math.random() * 5 | 0) + 6;

  }

}