Replacer

turtle.select(1)
if turtle.detectDown() then
turtle.moveForward()
if turtle.compareDown() then
turtle.digDown()
turtle.select(2)
turtle.placeDown()
end
end
turtle.turnRight()
turtle.turnRight()
turtle.moveForward()
if turtle.detectDown() then
turtle.moveForward()
if turtle.compareDown() then
turtle.digDown()
turtle.select(2)
turtle.placeDown()
end
end
turtle.turnLeft()
turtle.turnRight()
turtle.moveForward()
if turtle.detectDown() then
turtle.moveForward()
if turtle.compareDown() then
turtle.digDown()
turtle.select(2)
turtle.placeDown()
end
end