weird figure story

i was probably 7-8 years old when this happened. i was playing with my toys like any other kid would. but i had no siblings and nobody to play with, so id play all alone and id close the door and spend HOURS playing with my laptop and toys. i was sitting on the floor playing the door was close by so if anyone came in id hear and see it. but none came and i heard a weird noise on my right but ignored it. until i saw something i dont clearly remember but whitish grayish big dog legs and it didnt have any fur with nails. and something like a black robe and something black aswell as if it was holding something. i think this thing stayed for like 8 seconds or less but i couldnt forget that moment i even looked away and threw my toys and opened the door i didnt tell anyone till this day. until today haha.

i also felt very dizzy after it and whenever i used to play id leave the door open.