print("Tunnel has started.")

io.write("Please enter the width, in number of blocks, to dig: ")
width = io.read()

io.write("Please enter the height, in number of blocks, to dig: ")
height = io.read()

print("Tunnel will run with parameters width = " .. width " and height = " .. )

currentDug = 0
for i = 0, height, 1 do
  while (currentDug < width) do
    turtle.dig()
    currentDug += 1
    turtle.forward()
    if (currentDug == width) then
      turtle.digUp()
      turtle.up()
      currentDug = 1
      turtle.turnRight()
      turtle.turnRight()
    end