Jenga

///////////////////////////////////
// JENGA ///////////////////////
  /* add levels */
  var moveX = boxWidth + boxGap;
  var moveY = boxHeight + boxGap;
  /* draw copies in a row */
  for (var j = 0; j < numFloors; j++) {
    for (var i = 0; i < numRows; i++) {
      /* modulor => every second level */
      var modFloor = j % 2;
      if (modFloor == 0) {
        cube.position.x = ( - ((boxWidth + boxGap) * ( numRows - 1 ) / 2 ));
        cube.position.z = 0
      } else {
        cube.position.x = 0;
        cube.position.z = ( + ((boxWidth + boxGap) * ( numRows - 1 ) / 2 ));
      }
      var cubeSec = cube.clone();
      /* rotation of every second level */
      if (modFloor != 0) {
        var rotateBox = 90;
        cubeSec.rotation.y = ( rotateBox / 180 ) * Math.PI;
      }
      cubeSec.translateX( i * moveX )
      cubeSec.translateY( j * moveY )
      scene.add( cubeSec );
    }
  }