Behold! A playable Connect 4 board perfect for servers. I really don't have much to say about it, it took about a week to complete and wasn't as tricky as anticipated. Most of the wiring is underground, so no wire can be seen from the control boxes.
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Each control box features a redstone lamp, which will only be lit when it is that colors turn to go. (I made it using a simple T-FlipFlop switch with one side inverted, in case any of you care) :)
Each box also has an emerald block with a button that when pressed, will clear the entire board of all "game pieces" which can be "recycled" (collected) from under the board.
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Each color is loaded with enough sand/gravel to fill the board four times, so you should be able to squeeze 10 games out of one load (they come pre-filled, of course.)
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I enjoyed making this project and hopefully when you download it you'll enjoy tinkering around with it :)

If you feel like I deserve it please leave me a diamond! It would make me happy :D

And as always, have a nice day!