Revenge time !!! some sweet revenge is needed?

ok so heres the thing ... me and me sister o up to our friends , salwa ( 12 ) and noora ( 10 ) every saturday to hang out . this saturday salwa answers the door saying that noora has a friend over . ( which in their eyes is a huge thing cuz nobody in their school likes them ) anyway noora was totally ignoring safia ( my sister ) usually their bffs and noora was being soooo rude . the friends name was niamh , shes from australia ( i have nothin against australians btw ) but this girl , niamh was a complete ***** . she is 9 .i said hllo 2 her and she just stared at me . extremely unfriendly ) anyway later on in the day niamh and noora stared coloring . me , my sister and salwa all sat down with them. .. though it was pretty clear we were not wanted there . i said g 'day mate . big mistake . they told salwas mom on me . i got in troubl 4 " teasing " her . wtf . wheni heard her tellin on me i declared war . so did they . now i was me ,my sister and salwa ON ONE TEAM AND NOORA AND NIAMH ON THE OThER . we were told on another 3 times nd we kept making fun of them , childish , but we cud see it annoyed them .when we were upstairs thetryed 2 push the on us so we pushed and they pushed and then i had an idea i muttered let go, and niamh and came flying i n the door and fell over they were nearly crying .we started roaring laughing . as u can imagine it made them reallly mad noora flew at me with her tin whistle and i kicked her . triumhp. it happened ( the door thing ) again later 2 noora .then i told saphia 2 sit on the chair wit da door open while me and salwa hid in d a closet the though safia wuz on her own so they came in 2 tease her and me and salwa jumped out of the closet the ran . later niamh , who is scared of safia kicked the door safia opened it and niamh ran so fast away . anyway noora will be comig up 2 my house soon and i am thinking of a way 2 pay her back . any ideas ? dont tell me not 2 though .