Be aware that the effects of k are highly dose dependent. From feeling kinda drunk and not at all psychedelic to being in a place where reality, time, your identity breaks down completely.
You may want to build to the weird and wonky effects by doing smaller lines repeatedly, say every 20 minutes, though it's fairly common to lose your sense of time and of how much you've done, so maybe rack them out first and have a clock or something.
I don't find K that visual in a patterns and colours way, K is more cognitive, but visuals on a screen can be good. The weird animated, reality bending type is fun. The videos to Slot Hum or ElkCloner by the band Sculpture had me thinking they must have been made on K. If you watch a movie you get get total immersion.
If you keep doing lines enough to hole you won't care where you are or what music is around or know whether your eyes are open or shut, as you'll be shut down to the outside world. Just make sure you are safe (no candles, cigarettes, any other danger you won't be able to deal with or even aware of)