RaphiMine

local i=0
for x=0,25,1 do
	i=0
	if x==0 or x%4==0 then
			turtle.select(2)
			turtle.refuel(1)
	end
	while i<25 do
		while turtle.detect() do
		 turtle.dig()
		end
		turtle.forward()
		turtle.digUp()
		turtle.digDown()

		if i%5==0 and (x==0 or x%5==0) then
			turtle.select(1)
			turtle.placeDown()
		end
		i=i+1
	end
	if x==0 or x%2==0 then
		turtle.turnLeft()
		while turtle.detect() do
		 turtle.dig()
		end
		turtle.forward()
		turtle.digUp()
		turtle.digDown()
		turtle.turnLeft()
	else
		turtle.select(3)
		turtle.placeDown()
		turtle.turnRight()
		while turtle.detect() do
		 turtle.dig()
		end
		turtle.forward()
		turtle.digUp()
		turtle.digDown()
		turtle.turnRight()
	end
end