1. Adjust the slider to select the level of difficulty and click on the 'Start' button.[br]2. Click on the lower empty bar when it appears and type in your estimated value in the provided box.[br]3. Click on the upper empty bar when it appears and type in your estimated value in the provided box.[br]4. Click on the 'Next' button to show a visual representation of your entered numbers.[br]5. Click on the 'Next' button to show the actual values.[br]6.  Click on the 'Reset' button to start again.