Created a Full Vertical Circles Module and created a build_pipe app

Underwater_Base/build_pipe.lua

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+--[[ App for building an underwater Pipe
+--written by TheLux
+--Check https://i.redd.it/swn3e9w8dyc31.jpg to see
+--the references for the numbers]]
+
+--- Check if the fvcircles API is present
+-- and load it. We need it
+if not os.loadAPI('fvcircles.lua') then
+  error('Error! fvcircles.lua is missing. Please insert it into turtle.')
+end
+
+print("How many pipes do you want to build: ")
+local pipes = read()
+
+print("What should be the outer Material (ex. glass): ")
+local omaterial = read()
+
+print("What should be the inner Material (ex. sand): ")
+local imaterial = read()
+
+print("Building a " .. pipes .. " blocks long tunnel")
+for i = 1, pipes do
+  turtle.down()
+  fvcircles.fvcircle5(omaterial, imaterial)
+end
+
+print("Done build the tunnel")