-- miner

function refuel()
        if turtle.getFuelLevel() ~= "unlimited" and turtle.getFuelLevel() < 1 then
                turtle.select(1)
                turtle.refuel()
				print("refueling")
		end
end

function getCords()
		print("how deep?")
		deep = tonumber(read())
end

print("Hello and welcome to 3x3-miner v0.1a")
print("Coal in slot 1, torches in slot 2.")
print()
getCords()
refuel()

a = 1
b = 8
turtle.select(3)
repeat
	if b == 8 then
			turtle.turnLeft()
			turtle.turnLeft()
			turtle.select(2)
			turtle.place()
			turtle.turnLeft()
			turtle.turnLeft()
			turtle.select(3)
			b = 1
	end
	turtle.dig()
	turtle.up()
	turtle.dig()
	turtle.up()
	turtle.dig()
	turtle.down()
	turtle.down()
	turtle.turnRight()
	turtle.forward()
	turtle.turnLeft()
	turtle.dig()
	turtle.up()
	turtle.dig()
	turtle.up()
	turtle.dig()
	turtle.down()
	turtle.down()
	turtle.turnRight()
	turtle.forward()
	turtle.turnLeft()
	turtle.dig()
	turtle.up()
	turtle.dig()
	turtle.up()
	turtle.dig()
	turtle.down()
	turtle.down()
	turtle.turnLeft()
	turtle.forward()
	turtle.forward()
	turtle.turnRight()
	turtle.forward()
	a = a + 1
	b = b + 1
	refuel()
until a > deep

turtle.turnLeft()
turtle.turnLeft()
turtle.up()
for i = 1,deep,1 do
	turtle.forward()
end
turtle.down()
print("Job done!")