kill

back = peripheral.wrap("back")
run = ""
argsss = {...}
args = argsss
function kill()
	while true do
	mobs = back.sense()
		for i = 1, #mobs do
			for s = 1, #args do
				if args[s] ~= 0 then
					if mobs[i].name == args[s] then
						local entity = mobs[i]
						local x, y, z = entity.x, entity.y, entity.z
						local pitch = -math.atan2(y, math.sqrt(x * x + z * z))
						local yaw = math.atan2(-x, z)
						back.fire(math.deg(yaw), math.deg(pitch), 5)
						i = #mobs
						sleep(0.5)
					end
				end
			end

		end
	end
end
function reads()

    while run ~= "stop" do
        split = {}
        argum = {}
        arguments = 0
        run = read()
        if run ~= "stop" then
		split[0] = 0
            for i = 1, string.len(run) do
               if string.sub(run,i, i) == " " then


					split[#split+1] = i

					if (#split == 0) then
						argum[0] = string.sub(run,split[#split-1]+1, i-1)
					else
						argum[#argum+1] = string.sub(run,split[#split-1]+1, i-1)
					end

               end
           end
		   split[#split+1] = string.len(run)
		   argum[#argum+1] = string.sub(run, split[#split-1]+1, string.len(run))
		   if argum[1] == "add" and #argum > 0 then
				length = #args
				for i = 2, #argum do
					args[length+i] = argum[i]
					print(args[length+i])
				end
			end


		end
	end
end
parallel.waitForAny(reads, kill)