A bit confused what I saw

So yesterday I did my meditation as normal,read a book little bit(in bed) and when I switched off the light to go to sleep I saw this small light(like a firefly). I was looking at it and it kept changing color(all bright colors). It kept moving sideways and up and in my mind I asked if it is my spirit guide or coming from the highest good to fly up and it did. I asked three times and and it flew up. It kept moving in different directions and then suddenly smaller light joined in and it kept coming closer. My ego was screaming to close my eyes because these are the monsters eyes and I could feel the rush of fear but I told it(my ego) to go away and be quiet. I kept looking at the light,still moving and I felt excited that maybe finally I did manage to see my spirit guides but a bit frustrated(yea I know,very egoistical) that I couldn't hear them. Then suddenly it flashed and it turned into some kind of triangle with lines inside and it just dissapeared.

There is no way it came from outside because it was where the wall is,oposite there is a wall as well,it was pitch dark in the room. So it couldn't come from any electronical device(only thing in my room was my mobile behind me).

So, I ask you dear friends, if anyone expirienced this as well or if you can tell me what did I just see.

P.S. I didn't feel any sudden love or tranquility.