Pick specific elements from array

Question

I hava an array with 17 images. I want to pick every image from the array and put it on the stage but there should be a specific manner to do this. After I picked the first image I need the nith one so this should look like this:

var myarray = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16]; // these are the indexes for the 17 images

The order to pick the elemets looks like this : [0,9,1,10,2,11,3,12,4,13,5,14,6,15,7,16,8];

I need to use them in a Tween , this is the function where I am doing this but I do not have the oder I mentioned above.

var pick_images = function(lights_arr,iterator,f)
{
  if(iterator < lights_arr.length)
  {
    iterator = iterator +1;
  }
    createjs.Tween.get(lieghts_arr[iterator]).to({alpha:0},200).wait(0).to({alpha:1},200).wait(100).call([f,lights_arr,f]);
pick_images(arr, i,pick_images);

I know that if I take the lights_arr.length and divide it by 2, round it up I have allways the second image like 9,10,11 or 12. For this I need after every loop to substract two elemets ( images ) I used.

Do you know how can I do this to work in my function ?

Answer 1

How about this?

var myarray = [0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16];

var select = [];
var step = 9;
var len = myarray.length;
for(var i = 0; i < len * step; i += step)
    select.push(myarray[i % len])

console.log(select) // [ 0, 9, 1, 10, 2, 11, 3, 12, 4, 13, 5, 14, 6, 15, 7, 16, 8 ]