function changeDimension(arr, size) {
var arrLen = arr.length;
var newArr = [];
var count=0;
var tempArr = [];
for(var i=0; i<arrLen; i++) {
count++;
tempArr.push(arr[i]);
if (count == size || i == arrLen-1) {
newArr.push(tempArr);
tempArr = [];
count = 0;
}
}
return newArr;
}
changeDimension([0, 1, 2, 3, 4, 5], 4);