MOBILE WILL GENERATE A FOUR DIGIT NUMBER USER HAS TO GUESS THAT NUMBER CORRECTLY

BULL - [ RED Circle ]
Guessed a correct digit which is also in the correct position.

COW - [ GREEN Circle ]
Guessed a correct digit but it is in the wrong position.

For example : if the number generated is 7831
1) Guess is 9278 -[ 2Cows] you have guessed 2 digits correctly but it’s in the wrong position.
2) guess is 9871 -[ 1Cow & 1Bull ] you have guessed 2 digits correctly but one is in the wrong position,other is in the correct position.
2) guess is 7812 -[ 3Bulls & 1Cow ] you have guessed 3 digits correctly in the correct position......Keep gueesing till you get 4 Bulls.