message: Fix selectFrame command error
diff: @@ -556,7 +556,7 @@ function executionLoop() {
  /* TODO: string error handling & wait for information been stored */
  let str = commandTarget.substr(commandTarget.lastIndexOf('=') + 1);
  if (str == "parent")
  - currentPlayingFrameLocation.length = currentPlayingFrameLocation.lastIndexOf(':');
  + currentPlayingFrameLocation = currentPlayingFrameLocation.slice(0, currentPlayingFrameLocation.lastIndexOf(':'));
  else
  currentPlayingFrameLocation += ":" + str;
  console.log(currentPlayingFrameLocation);
  