How do I make it so these squares do the following?

Basically I have the following:

https://i.gyazo.com/07c313a27d3f61722634569ea87a6c26.png

1. Firstly I am trying to stop the squares overlapping as per number 7 in my event sheet, with this as it is currently squares randomly disappear as they do that but I don't want them to do that but I dunno how to stop it
2. Secondly I am trying to make it so up to 4 squares appear along side each other kinda like making a tetris shape but only up to 4 blocks horizontally or vertically but sometimes it will do 1 block or 2 blocks or 3 blocks, how do I achieve this?

I have also tried it like so:

https://i.gyazo.com/45fc840e3f069f50457e05ce149f218e.png

However it resulted in:

https://i.gyazo.com/fb94d6bcf8dc5a3a7579ef552d188f12.gif

Where there is only so many places the pink square can go before it runs out of places. It seems better to destroy on any collision or overlap but then I am left with the issue that it randomly destroys it without doing neither a collision or overla.

The first problem: When 'Pink' overlaps with 'Pink' it destroys 'Pink'. So it destroys both of them.

You need to specify in the condition by saying: Pink: Pick Top Instance, then it will destroy the recently created one.

Yes you can instead just randomly relocate it, instead of destroying.

I assume you'd want them to be created on a grid-like pattern, instead of randomly scattered? You can make use of the modulo operator % to achieve that. for example:

PinkSquare Set position: random(192,896) % 64, random(192,896) % 64

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Second question: So you're trying to make only Tetris-type shapes? In that case, you would 'Pick' a pink square (let's say: Top instance), then 'Spawn' pink. (This will create another Pink on top of it), then just move it Either x by 64 (or -64) or y by 64 (or -64). You can use the choose expression for that. If the squares are symmetrical and square, then this might work nicely:

PinkSquare Rotate clock-wise: choose(90,-90)

PinkSquare Move forward: choose(64,-64)

But make sure to remove the 'destroy' on overlapping, that can cause more problems later, especially when you'll want to actually check for overlapping two different tetris blocks, etc. They'll just destroy.