Please, read the game rules at the above link, then
first choose how many different digits would you like to have in your code and
what is the length of the code. Then think of a code with different digits, and
the computer will try to break that code.
The picture 
means, that the number is in the code, but at the wrong place,
means, that the number is in the code at the right place.
After the computer's guess enter the appropriate numbers in the input boxes,
that matches your code. Note, that for code length 6 and 10 different digits
it may take up to 15 seconds to compute the second guess.
Have fun... :) .