Potong bola pingpong (tenis meja) menjadi dua. Nyalakan white noise. Atur cahaya. Rekatkan bola pingpong di mata. Tunggu sampai adanya halusinasi.

I'm interested in that, but I only have a few mins. Can you give me at most the first 500 characters of a detailed explanation in English about that?
The Ganzfeld technique is one that utilizes sensory deprivation to produce hallucinations and other unusual mental states.  In order to block out the sight you will be using ping pong ball halves, placing them over your eyes.  Get a ping pong ball and cut it directly and evenly in half to begin.  Draw a guideline with a  marker or pen to make sure your cut will be even and straight. You can try cutting the ping pong ball with a razor or sharp knife. In order to block out your sense of sound the