-- Program that sends a redstone pulse at noon and midnight

-- the side of the computer to output the pulse
local SIDE = "right"

function pulse ()
    rs.setOutput(true, SIDE)
    os.sleep(0.05) -- maybe sleep for a tick?
    rs.setOutput(false, SIDE)
end

while true do
    local timedelta = (os.time("ingame") % 12) * 60 -- all times in seconds
    local sleep_amt = ((12 * 60) - timedelta) / 2 -- cut the time in half?
    if timedelta < 1 then
        pulse()
        os.sleep(1) -- don't pulse more than once
    elseif sleep_amt > 1 then
        os.sleep(sleep_amt)
    else
        os.sleep(0.2)
    end
end