obsidian

-- obsidian
-- Generate obsidian blocks from redstone dust
-- Version: Rev 0.1

message1 = "Place redstone dust in slot 1"
message2 = "Place bucket of lava in slot 6"
usage = "obsidian  (No arguments)"

args = {...}
nArgs = #args

function forward(nBlocks)
	for i=1,nBlocks do
		turtle.forward()
	end
end

function back(nBlocks)
	for i=1,nBlocks do
		turtle.back()
	end
end

function placeRedstone()
	back(3)
	turtle.select(1)
	for i=1,7 do
		turtle.placeDown()
		forward(1)
	end
	back(3)
end

function mineObsidian()
	back(3)
	turtle.select(5)
	for i=1,3 do
		turtle.digDown()
		forward(1)
	end
	forward(1)
	for i=1,3 do
		turtle.digDown()
		forward(1)
	end
	back(3)
end

function employLava()
	turtle.up()
	turtle.select(16)
	turtle.placeDown()
	sleep(8)
	turtle.placeDown()
	sleep(3)
	turtle.down()
end

function offloadObsidian()
	turtle.up()
	turtle.turnLeft()
	if turtle.detect() then
		turtle.select(5)
		turtle.drop()
	end
	turtle.down()
	turtle.turnRight()
end

if nArgs > 0 then
	print(message1)
	print(message2)
	print(usage)
end

while true do
	if turtle.getItemCount(1) < 6 then
		break
	end
	placeRedstone()
	employLava()
	mineObsidian()
	offloadObsidian()
end

print("Redstone count is below 6.")