This one is hard...
Victim: Red-White
Murderer: Cuddles
When Cuddles was cheering up TODS, he thought that the contest could've just been a prank made up by Red-White, and decided to kill him. When Cuddles and Blue went to the kitchen for food, Cuddles secretly put carbon monoxide in the food Magi-Purple was making for Red-White. In afternoon, when Red-White was eating his food, he started choking because of the carbon monoxide, causing him to fall of his chair, his face to get purple, as he was slowly falling to his death.
Killer: BlackBot
When BlackBot said "Personally, i don't think we were harsh enough on Cyan", he meant that he deserved death. So BlackBot went somewhere to get a baseball bat and a baseball. Where? I have no idea! So before going to his room, BlackBot went to Cyan't room, and slammed the baseball into his face using the baseball bat. This caused a big hole in Cyan's head to appear, and he slowly bleeded to death. However, before he died, Cyan tried to write BB on the baseball, but died before trying to write the second B, which means Cyan accidently framed Blue for the murder. Before BlackBot left the scene, he hung Cyan on his fan (i dunno why), then left.
Also, Cyan and Cy-Blu were scared because they thought the killer was going to kill them next. However, since BlackBot was scared too, he should have been afraid of the same thing, but he wasn't meaning that he was sure of not being killed next, which is probably because he is the killer.