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Is there a reason this won't work?
I assume it's got something to do with my Actors and how I'm using them.
The last 2 lines work so they can be ignored.

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//Actor Vars = Colour and Colour Match
//Actors = Border and ball
//1 - Get All Balls Colliding With Border
//2 -For Each Of The Balls Colliding
//3- Get all balls colliding with the checkball
//4 -For all balls colliding with the checkball check the colour and see if it matches

int i,n;
Actor * TheseBalls =getAllActorsInCollision("Border",&n);//1
for(i=0;i<n;i++) //2
{
  int j,m;
  int ThisColour;
  Actor*CheckBall = getclone2("ball",TheseBalls[i].cloneindex);
  Actor*CollidingActor = NULL;
 
  CollidingActor = getAllActorsInCollision("CheckBall",&m);//3
  for(j=0;j<m;j++)
  {
    if(CollidingActor[j].Colour==CheckBall->Colour) //4
      CheckBall->ColourMatch++;
  }
}
 CreateActor("Trigger", "icon", "(none)", "(none)", 10, 205, true);
DestroyActor("Event Actor");

tell us what exactly doesn't work

It doesn't do the first for loop (and maybe not the 2nd once the first is working)

I know this because I added an integer starting at 0 and added 1 to it at various stages.

The end value of the integer was 2 (checked in a text box)
so that was +1 before the for loop and +1 after the for loop

bit more info that I should have included - Border is a Filled Region and inside it there are currently 8 ball actors

This code is in a seperate actor called setup. It is in the Draw function and is only to be executed once at the start of the game. Which is why it is destroyed at the end

what do you want to express with this

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getclone2("ball",TheseBalls[i].cloneindex);

I was going to use

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 CollidingActor = getAllActorsInCollision(TheseBalls[i].cloneindex,&m)

but kept getting errors so I thought it might be better to use

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  Actor*CheckBall = getclone2("ball",TheseBalls[i].cloneindex);
  CollidingActor = getAllActorsInCollision(TheseBalls[i].cloneindex,&m);


I also tried

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  Actor*CheckBall = getclone2("ball",i);

but this only seems to work if the balls cloneindex's are in sequence 0 to amount of balls colliding

As a further note I don't think it actually gets to the line

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 Actor*CheckBall = getclone2("ball",TheseBalls[i].cloneindex);


because I put the debug line below it and it did not add 1 to the value

I have located where I think the problem is

When using the following the output is 0 when it should be 8. (8 actors in between the filled region border)

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int n;
Actor * TheseBalls = NULL;
TheseBalls = getAllActorsInCollision("Border",&n);//1
texty.textNumber =n;

It's OK this seems to do it (not sure if it's the best way to do it though so feel free to correct me )

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//1 -Get All Balls Colliding With Border
//2 -For Each Of The Balls Colliding
//3 -Get all balls colliding with the checkball
//4 -For all balls colliding with the checkball check the colour and see if it matches

int i;
int n;

Actor * TheseBalls = NULL;
TheseBalls = getAllActorsInCollision(Border.clonename,&n);//1
if(TheseBalls)
{
 for(i=0;i<n;i++) //2
 {
  int j,m;
  int ThisColour;
  Actor*CheckBall = getclone2("ball",TheseBalls[i].cloneindex);
  Actor*CollidingActor = NULL;
  CollidingActor = getAllActorsInCollision(CheckBall->clonename,&m);//3
  for(j=0;j<m;j++)
  {
    if(CollidingActor[j].Colour==CheckBall->Colour) //4
      CheckBall->ColourMatch++;
  }
}
}
CreateActor("Trigger", "icon", "(none)", "(none)", 10, 205, true);
DestroyActor("Event Actor");