Tsunami Command Minecraft 1.10

(So this is not the text right here! The text will be after the sentence... This is a line for a Minecraft tsunami... You need two Command blocks which you can get with the "/give exampleUsername command_block" And be in 1.10... It works for me! And after you do the lines of code you'll need to summon the Armor Stand... The code is "/summon ArmorStand"... Alright well, that is it! After this sentence will be the actual code you put into the two command blocks.)

First Command Block Code: /tp @e[type=ArmorStand] ~ ~ ~-1

Second Command Block Code: /execute @e[type=ArmorStand] ~ ~ ~ /fill ~-50 ~30 ~ ~50 ~30 ~ water

Command to spawn Armor Stand: /summon ArmorStand

(Feel free to edid the number's in the second code, but it's better to keep it the same...