LIGHT_LEVEL_DAY = 250
    LIGHT_LEVEL_NIGHT = 40
    LIGHT_STATE_NIGHT = -1
    LIGHT_STATE_DAY = 1
    LIGHT_STATE_SUNRISE = 1
    LIGHT_STATE_SUNSET = -1

    lightLevel = LIGHT_LEVEL_NIGHT
    lightState = LIGHT_STATE_NIGHT


    SUNSET = 18 * 3600
    SUNRISE = 6 * 3600
    dayCycle = 24 * 3600
    lightHourDelta = 10--1440 * 10 / dayCycle;
    lightHour = (SUNRISE - (SUNSET - SUNRISE) / 2) + (5 * 60)

function checkLight()
  lightHour = lightHour + lightHourDelta
  print(string.format("%.2f",lightHour/3600))

    if (lightHour > dayCycle) then
        lightHour = lightHour - dayCycle
    end

    if math.abs(lightHour - SUNRISE) < 2 * lightHourDelta then
        lightState = LIGHT_STATE_SUNRISE
    elseif math.abs(lightHour - SUNSET) < 2 * lightHourDelta then
        lightState = LIGHT_STATE_SUNSET
    end


  newLightLevel = lightLevel
    lightChange = false

  if lightState == LIGHT_STATE_SUNRISE then
            newLightLevel = newLightLevel + (LIGHT_LEVEL_DAY - LIGHT_LEVEL_NIGHT) / 30
            lightChange = true
    elseif lightState == LIGHT_STATE_SUNSET then
        newLightLevel = newLightLevel - (LIGHT_LEVEL_DAY - LIGHT_LEVEL_NIGHT) / 30
        lightChange = true
  end



    if (newLightLevel <= LIGHT_LEVEL_NIGHT) then
        lightLevel = LIGHT_LEVEL_NIGHT
        lightState = LIGHT_STATE_NIGHT
    elseif (newLightLevel >= LIGHT_LEVEL_DAY) then
        lightLevel = LIGHT_LEVEL_DAY
        lightState = LIGHT_STATE_DAY
    else
        lightLevel = newLightLevel
    end

    print("lightLevel: "..lightLevel)
end


for i = 1, 86400/lightHourDelta do
  checkLight()
end