local function yaw_pitch(xoff,yoff,zoff)
	local yaw = -math.deg(math.atan2(xoff,zoff))
	local perp_dist = math.sqrt(xoff*xoff+zoff*zoff)
	local pitch = -math.deg(math.atan2(yoff, perp_dist))
	return yaw,pitch+2.5
end

local scanner = assert(peripheral.wrap"right")
local laser = assert(peripheral.wrap"left")

while true do
	local scanned = scanner.scan()
	local targets = {}
	for _,s in ipairs(scanned) do
		if s.name ~= "minecraft:air" and s.y < 0 and s.y > -5
			and s.z <= 7 and s.z >= -8
			and s.x <= 7 and s.x >= -8 then
			local should_add = true
			
			for i,t in ipairs(targets) do
				if t.x == s.x and t.z == s.z then
					should_add = false
					if s.y > t.y then
						targets[i] = s
					end
				end
			end
			if should_add then
				table.insert(targets,s)
			end
		end
	end
	for _,v in ipairs(targets) do
		local yaw,pitch = yaw_pitch(v.x,v.y,v.z)
		print(v.x,v.y,v.z,yaw,pitch,v.name)
		laser.fire(yaw,pitch,4)
	end
	if #targets == 0 then
		for i = 1,3 do
			if turtle.detectDown() then break end
			assert(turtle.down())
		end
	end
end