Secret Trapdoor Tutorial

This is how to make "Secret Trapdoor" from my previous shorts video.
This is a command you put in a command block and it will spawn the ghost block ontop of the command block:
/summon minecraft:block_display ~-.5 ~.5 ~-.5 {block_state:{Name:diamond-block}}
And to destroy it: /kill @e[type=minecraft:block_display]
Hope you enjoyed!
Texture pack - Faithless