Rain manager

while true do
    event, param1 = os.pullEvent()
    if event == "redstone" then
        if redstone.getInput("left") == true and redstone.getInput("top") == true then
            redstone.setBundledOutput("right", colors.yellow)
            print ("Dissipating rain.")
            sleep(2)
            redstone.setBundledOutput("right", 0)
            sleep(20)
        elseif redstone.getInput("left") == false and redstone.getInput("top") == false then
            redstone.setBundledOutput("right", colors.magenta)
            print ("Seeding clouds.")
            sleep(2)
            redstone.setBundledOutput("right", 0)
            sleep(30)
        end
    end
end