Load any ambience in kontkat . I recently used a laugh from the shining girl one . have it loop to end and reverse . Bascailly anything . Put modulation on it . the main adsr retrigger but all the bandpass moment resonance eq modulation will be not re triggered . Next load absynth . Start with presets tweaking the envlopes . Learn to add envlopes and how to loop them and have it loop really short and only vary 5 % so it lightly wobbles but not a lot . the short ones tend to not have an obvious loop point leaving it to be more of a tone it creates or timbre . Look into its granular synth section heavily for random bloop bplips to poke through . two pads absynth and kontkat atmosphere sample and your done .