How do I Create a Random Grid of Sprites?

I'm trying to get my head round the best approach (that doesn't involve creating a grid of spawners etc).

I'd like to create a grid, for instance a checkerboard... made up of random different color sprites (squares for now for ease).

So Yellow, black, red, blue, green, orange sprites etc. etc.

However I need to make sure that the array always includes at least 3 of a specific color sprite such as red.

I would randomise the grid of sprites each time.

Any advice to automate this please? I'm thinking it's an array, but can't get my head around it currently.

Thanks for any help

here is a sample of how to do something along the lines of what Maverick was suggesting...

https://www.rieperts.com/games/forum/ColorSquares.c3p

it doesn't limit how many times other colors can be added, but you are guaranteed 3 of the color chosen in the dropdown list.

if you don't mind more than 3 of the chosen color then just delete the while block in the BuildBoard function

essentially, it builds an array of colors to use for the squares. it doesn't need to sort or do anything to the array because it just randomly chooses an index for the next square and then deletes that index so it can't be picked again.