function digIt()
while turtle.detect() do
turtle.dig()
os.sleep(0.5)
end
turtle.forward()
while turtle.detectDown() or turtle.detectUp() do
turtle.digUp()
turtle.digDown()
end
end
function placeTorch()
turtle.select(16)
turtle.placeUp()
end
local run = 0
term.write("Tunnel length: ")
run = read()
for i = 1, run do
k = i - 1
j = k % 4
digIt()
turtle.turnLeft()
digIt()
turtle.turnRight()
turtle.turnRight()
turtle.forward()
digIt()
turtle.back()
turtle.turnLeft()
if i == 2 or j == 1 then
turtle.back()
turtle.turnRight()
turtle.forward()
placeTorch()
turtle.back()
turtle.back()
placeTorch()
turtle.forward()
turtle.turnLeft()
turtle.forward()
end
end
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