stepArr=[];

function someKind(start, middle, end){
  var leftI = start,
      rightI = middle + 1;
  var result = [];
  var temp;
  while (leftI <= middle && rightI <= end){
     if(Compare(arr[leftI], "<", arr[rightI], result)){
       temp = arr[leftI];
       leftI++;
     }
     else {
       temp = arr[rightI];
       rightI++;
     }
     result.push(temp);
  }
}

function Compare(i, symbol, j, resultArr){
  stepArr.push(["Compare", i, j, resultArr]);
  if(symbol == "<"){
    return i < j;
  }
}