Click the Green Flag and then click the operation you want to do, the first number you type will be the input for number 1 and after three seconds you will get to type input for number 2 and the answer will be shown after a while ( for squaring you only need to type input for number 1) press the space key to go back
I did the code art myself but Thanks to my friend Matthew for inspiring me with his "Factorial Machine" on Python