Please help me with my sister!?

Hi I'm 14 years old and my sister has had cancer (leukemia) for the past 2 years or so. not too long ago the doctors at the hospital sent her home because there was nothing more they could do. i have another sister and a brother. now she has been sent home and has home care. (hos pis, but i don't know how to spell it sorry) they said she only has a few days to live and my moms family and my sisters husbands family are always here with her so shes never alone. unfortunately, she hallucinates a lot so she doesn't really know were there all the time. i really don't wanna lose my sister! she wants to be cremated and i just read what the was and it scared me. i guess its her choice though. after being cremated were each gonna get a necklace and some of her ashes are going to be in them. i already picked mine but we can have something engraved on the back but it can only be 11 characters including spaces. please help me think of something to say. by the way shes 21 years old and please help me. i don't know what to do without her i have looked up to her forever and this is really hard to even think about. also could you name some songs that might fit this situation for the funeral because we want to make a slideshow with music in the background. thanks so much!