How do I make retactable objects from inside a circle?

I'm looking for a mechanic where that has a object retract in and out, similar to don't touch the spikes game, but inside of a circle instead of a square.

I'm looking for it to be a random set of objects to appear each time, but they can appear anwhere around the edges of a circle.

Can anyone help with this mechanic?

If I understand you correctly, what you need is a way to spawn objects randomly spread on a circle?

If so, this is what I would do:

• Set a number variable to random(360) to get a random angle
• Now, to the more complicated part: Getting the coordinates of the point on the circle using the angle we created before
• Get the X coordinate with this calculation: [X coordinate of circle center] + cos(angle) * [circleRadius]
• Get the Y coordinate with this calculation: [Y coordinate of circle center] - sin(angle) * [circleRadius]

This should get you going.

Here is an example .capx, in case you are stuck.

randomly

Thanks for the reply, I'll check this out.