strip

local x = 1

function df()     -- Dig forward on block
   turtle.dig()
   turtle.forward()
   turtle.digUp()
   turtle.digDown()
end

function reverse()        --does a full 180 in the same block
   turtle.turnLeft()
   turtle.turnLeft()
end

-- Main loop --

term.write("Depth = ")  --gets x from the user
x = tonumber(read())

for i = 1,x do
   df()
end
reverse()
for i = 1,x do
    turtle.forward()
end