IMPORTANT: YOU MUST BE USING THE LATEST 1.8 SNAPSHOT OR 1.8 OR THE CALCULATOR WILL NOT WORK!!

This is a calculator I have made using command block features from the latest 1.8 snapshots. It features a glowing display, working buttons, and a 2304 by 128 pixel display (using maps).

Instructions:
To use, first make sure that you are in the latest 1.8 snapshot. Then, find the blank key in the keypad. This is the clear key. To use it, double-click the center of it. Now you can type in your first number. Again, do this by double-clicking in the center of the number that you want to press. Once you have typed in your first number, press the operator key you would like to use (+, -, *, /) and type in your second number. Finally, to compute the answer, double-click the center of the equals key. You can reset or clear the calculator at any time by pressing the blank clear button on the keypad.