Manual primary or secondary performance task for experiments
User should balance a blue cross in the middle of the screen (yellow spot).More information: http://www.lfe.mw.tum.de/en/open-source/mttThis program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.added option for time limit / countdown i.e. automatic end after [x] seconds