igordonin

// matrix(5)
//     [[1,  2,  3, 4,  5],
//     [16, 17, 18, 19, 6],
//     [15, 24, 25, 20, 7],
//     [14, 23, 22, 21, 8],
//     [13, 12, 11, 10, 9]]

function Position(n) {
  this.row = 0;
  this.column = 0;