Your goal is to find the secret four-color code. The following colors are possible: black, red, purple, blue, white, green.
Some guesses have already been made. I will provide feedback for each guess made with which it is possible to unambigiously determine the secret code.

Previous Guesses:
Guess: ['white', 'blue', 'purple', 'red']. Hint: one color is in the correct position and one color is in the secret code but in the wrong position.
Guess: ['black', 'red', 'purple', 'red']. Hint: two colors are in the correct positions.
Guess: ['green', 'black', 'purple', 'white']. Hint: one color is in the correct position and two colors are in the secret code but in the wrong position.
Guess: ['black', 'white', 'purple', 'black']. Hint: two colors are in the correct positions.
A B C D
white, white, red, blue black, green, purple, blue red, white, blue, green red, blue, green, black