Go and open the blood door,

maybe you will see vampires sucking blood,

black bats 

or a vampire turning into ash from the sun’s hot beam. 

Go and open the shamrock door, 

maybe you will find  the chaotic emerald in sonic 2.

Go and open the diamond door,

maybe you will see Minecraft Steve mining iron or Minecraft Alex fighting the ender dragon.

Go and open the emerald door,

maybe you will see an alligator snapping its razor sharp teeth.

Go and open the frost door,

maybe you will see a snowman screaming for help before he melts