Infinite tetration fractal pictures

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I created some more awesome pictures with focus on spirals in the fractal.
I changed the software from "fractal explorer" to chaos pro which is somehow more prefessional when needed for fluidly navigating a fractal and it is especially faster.
As it is perhaps somewhat cumbersome (for the viewer) to put the photos directly in the thread I decided to make a small gallery and just put a snapshot of the thumbnails here...

Could you post the formula for that, please? the formula I'm using is:

Code:

cp_97545
{
parameter complex perturb;

    void init(void)
    {
        z=perturb;
    }
    void loop(void)
    {
        z=pixel^z;
    }
    bool bailout(void)
    {
        return(|z|<16);
    }
    void description(void)
    {
        this.title="Tetration";
        this.helpfile = "ChaosPro.chm";
        this.helptopic = "Iteration Formula";
        this.center=(1,3);
        this.angle=0;
        this.maxiter=250;
        this.periodicity=0;
        this.helpfile="formulas.html";
        perturb.caption="Perturbation";
        perturb.default=(0,0);
        perturb.hint="Start value for iteration, also called perturbation";
    }
}

It's just a modification of the default code, and while it looks like the tetration fractal, it's nothing like the images you've posted. Have I merely got the coloring wrong?