Your goal is to find the secret four-color code. The following colors are possible: black, red, blue, purple, green, white.
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: ['blue', 'purple', 'green', 'red']. Hint: one color is in the correct position and three colors are in the secret code but in the wrong position.
Guess: ['red', 'red', 'blue', 'green']. Hint: three colors are in the secret code but in the wrong positions.
Guess: ['blue', 'green', 'red', 'purple']. Hint: one color is in the correct position and three colors are in the secret code but in the wrong position.
A B C D
black, purple, white, blue black, black, black, red black, blue, green, green green, purple, red, blue