Simple and easy.
The 5th post makes a challenge.
Example:
Skrillex vs Knife Party
+1 Knife Party by usernamessuckswithnumbers123888484
+1 Skrillex by iamderpy1232323
+1 Skrillex by bob123
+1 Skrillex by chupacabra
+1 Knife Party by derpy
The 5th post tells who wins, and makes a new poll and votes. Also for the last poll.
Anyway, i'll make the poll thing.
Anime vs Old Cartoons from the 30s to 90s.
+1 Anime