a=1				--initialisation des coordonée
verif=0
block=1
compteur=0
bedrock=0
tour=1
droitegauche=1
coin=1
compteur2=1
x2=0
z2=0

term.clear()
term.setCursorPos(1,1)
rednet.open("right")

print("X=?")	--initialisation des coordonée + envoie
X = io.read()
print("Y=?")
Y = io.read()
print("Z=?")
z = io.read()
rednet.send(??,X)
rednet.send(??,Y)
rednet.send(??,Z)

while x2==0 and z2==0 do --direction initial
	print("direction:")
	direction = read()
	if direction == "west" then
		x2=-1
		z2=0
	end
	if direction == "est" then
		x2=1
		z2=0
	end
	if direction == "nord" then
		x2=0
		z2=-1
	end
	if direction == "west" then
		x2=0
		z2=1
	end
end

function changement_de_direction() --fonction qui change la direction
	if droitegauche == 1 then
		if direction == "nord" or direction == "sud" then
			x2=z2*(-1)
			z2=0
		end
		if direction == "est" or direction == "ouest" then
			x2=z
			z2=0
		end
	end
	if droitegauche == 0 then
		if direction == "nord" or direction == "sud" then
			x2=0
			z2=z2*(-1)
		end
		if direction == "est" or direction == "ouest" then
			x2=0
			z2=z
		end
	end
end

while a==1 do			--Début des préparatif
	turtle.select(16)
	turtle.refuel(3)
	turtle.digUp()
	turtle.select(13)
	turtle.placeUp()
		while bedrock==0 do			--Quand la turtle dans déssendre
		turtle.select(8)
		if turtle.compareDown()then
			bedrock=1
		end
			turtle.digDown()
			turtle.down()
			while compteur<4 do
				compteur = compteur + 1
				while block<8 do
					turtle.select(block)
					block = block + 1
					if turtle.compare() then
						turtle.dig()
					end
				end
				block=1
				turtle.turnRight()
			end
		compteur=0
		turtle.select(8)
		end

		while bedrock==1 do											--quand la turtle se vide et se déplace en surface
			turtle.select(13)
			if turtle.compareUp()then
				while block<13 do
					turtle.select(block)
					block = block + 1
					turtle.dropUp(63-turtle.getItemSpace())
				end
				block=1
				turtle.select(12)
				turtle.transferTo(16,63-turtle.getItemSpace())
				bedrock=0
			else
				turtle.digUp()
				turtle.up()
			end
			if bedrock==0 then
				if tour==compteur2 then
					tour=tour+2
					compteur2=1
					if droitegauche==1 then
						turtle.turnRight()
						changement_de_direction()
						turtle.dig()
						turtle.forward()
						turtle.dig()
						turtle.forward()
						turtle.dig()
						turtle.forward()
						turtle.turnRight()
						changement_de_direction()
						droitegauche=0
					else
						turtle.turnLeft()
						changement_de_direction()
						turtle.dig()
						turtle.forward()
						turtle.dig()
						turtle.forward()
						turtle.dig()
						turtle.forward()
						turtle.turnLeft()
						changement_de_direction()
						droitegauche=1
					end
				else
					coin=(tour+2)/2
					if coin==compteur2 then
					if droitegauche==0 then
						turtle.turnRight()
						changement_de_direction()
					else
						turtle.turnLeft()
						changement_de_direction()

					end
				end
			end
	compteur2=compteur2+1
	turtle.dig()
	turtle.forward()
	turtle.dig()
	turtle.forward()
	turtle.dig()
	turtle.forward()
	turtle.placeUp()
	X=x2+X
	Z=z2+Z
	rednet.send(??,X)
	rednet.send(??,Y)
	rednet.send(??,Z)
		end
	end
end