Simple colored array

I'm struggling to create a simple 5 x 5 canvas Simple colored array Sorry I'm completely new to this website but when I really do need is a simple JavaScript/java app Which does the Following For the user Every time that it is launched It will start with a button prompt that says start When user Head Start a random set of different colors will fill the 5 by 5 grid Then the task is to organize the colors accordingly with that a prompt saying task completed So basically what I need is a web application that uses a random set of colors such as blue yellow green red. And then when playing it shows 1,2,3 random color groups laid out on the 5x5 board then tells you to organize it such that all of color A is touching color A and color B is touching color B