--main

printf("inserire n")
lato=tonumber(io.read())
k=1
while(true)
j=0
while(j<4)
i=0
	while(i<lato)
	turtle.digDown()

	while(turtle.getItemCount(K)<2 and k<17) do
	k=k+1
	end

	if(k>16) then
		printf("RIMETTIMI IL MATERIALE E PREMI INVIO")
		io.read()

	else

	turtle.select(k)
	end

	turle.placeDown()

	turtle.dig()
	turtle.forward()
	i=i+1
	end

if(j=3) then
turtle.turnLeft()
turtle.dig()
turtle.forward()
turtle.turnRight()
turtle.dig()
turtle.forward()
lato=lato+2

end

turtle.turnRight()
j=j+1
end

end