Build me a memory based gaming app I.e Smriti varnan(name)

I want an app or an programming website . Very small programming and basic I want random sequence of colours to be generated consisting of 5 colours I.e white blue red black and yellow . And this is a type of memory game to memorise random sequence of colours like memorising sequence of 200 colours randomly generated consisting of 5 colours I mentioned above . The time anyone finishes memorising he would finish the game with timing details . Now 2nd window appears where u just fill those colours which are in ur head with the help of options provided for every particular box. And a similar app is speed numbers on Google play store. This app is having more functions but I want only a time function and a recall function simple with colours instead of numbers. And my app design would be like this 1 st window Home window will appear where there are three options [login to view URL] of colours to be memorised (and in front there are options like 50 100 200 300 or 400) 2. Time - (clock the time when it starts and when .The memorisation finishes time would appear with result . Now start button below When .We start 2nd window