OC robot runic altar

local component = require("component")
local sides = require("sides")
local os = require("os")
local robot = require("robot")
local inv = component.inventory_controller
local red = component.redstone
local pulsetime = 0.25

local function pulse(PT)
	red.setOutput(sides.back,15)
	os.sleep(PT)
	red.setOutput(sides.back,0)
end
local function dropcomparenot(slot)
	robot.select(slot)
	N = robot.count(slot)
	if not robot.compareTo(16) and N>0 then
		inv.equip()
		for i = 1, N do
			robot.useDown()
		end
	end
end
local function dropcompare(slot)
	robot.select(slot)
	if robot.compareTo(16) then
		robot.dropDown(1)
	end
end
local function activatealtar()
	for i = 2, 15 do  --dropping living rock
		dropcompare(i)
	end
	robot.down()
	robot.select(1)
	robot.placeDown()
end
while true do

	if robot.count(2) and robot.count(3) > 0 and red.getComparatorInput(sides.down) == 0 then
		os.sleep(0.1)
		for i = 2, 15 do  --use all items except living rock
			dropcomparenot(i)
		end
		while true do

			if red.getComparatorInput(sides.down) == 2 then
				break
			end
			os.sleep(0.2)
		end
		robot.up()
		activatealtar()
		os.sleep(0.1)
		for i = 2, 15 do
			robot.select(i)
			robot.drop()
		end
		pulse(pulsetime)

	end
	os.sleep(0.2)


end